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Computerized tomography

Subclass of:

378 - X-ray or gamma ray systems or devices

378001000 - SPECIFIC APPLICATION

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
378019000 Beam detection system 232
378008000 Object responsive 81
378005000 Energy discriminating 77
378009000 Plural sources 66
378016000 Beam energy or intensity control 63
378020000 Object positioning or aligning 54
378011000 Source or detector translation within plane 51
378015000 Continuous mechanical rotation 38
378007000 Scatter compensating 32
378010000 Nonrotating source or detector 18
378006000 Fluorescence or scatter mapping 15
378018000 With tissue equivalent material 8
378017000 Tiltable or nonvertical examination plane 5
20100067651METHODS AND APPARATUS FOR X-RAY IMAGING WITH FOCAL SPOT DEFLECTION - Methods and apparatus for x-ray imaging with focal spot deflection are provided. The apparatus includes an x-ray tube having a cathode configured to emit electrons and an anode having a target with a target surface defining a target angle. The emitted electrons are deflected onto the target surface with the target surface substantially aligned with a z-axis parallel to a gantry rotation axis.03-18-2010
20090252287Operating method for a swiveling polyplanar imaging system for time-resolved imaging of an object being examined - An operating method for a polyplanar imaging system for time-resolved imaging of an object is provided. First and second data records are recorded at a fan angle β from different angular positions by a first and second imaging planes arranged at an offset angle γ relative to each other and swiveled through an angle of at least φ=180°+β. A third data record is created by selecting projection images from the first data record beginning from a starting angle α and from the second data record so that the third data record covers an angular range of at least φ. Three-dimensional images are reconstructed based on the third data record. The starting angle α is varied for continuously creating the third data record until α has attained its final value. The contrast of projection images in the third data record or of three-dimensional images is evaluated.10-08-2009
20100310040METHOD OF CT PERFUSION IMAGING AND APPARATUS FOR IMPLEMENTING SAME - A CT system includes a scintillator array having a first length in an axial direction of the CT system, the scintillator array includes a plurality of scintillator cells along the first length. The CT system includes a controller configured to repeatedly position a subject fore and aft along the axial direction and over a second length of the CT system, the second length greater than the first length, energize an x-ray source to emit x-rays toward the subject while the subject is being repeatedly positioned, and obtain non-uniform projection data of the subject from the scintillator array, the non-uniform projection data comprising the x-rays received from the x-ray source while the subject is repeatedly positioned. The CT system includes a computer programmed to reconstruct a plurality of temporally non-uniformly spaced images from the non-uniform projection data, interpolate the plurality of non-uniform images to form a plurality of temporally uniform images, and apply a perfusion map generation process to the plurality of temporally uniform images.12-09-2010
20100067652X-RAY CT APPARATUS - An X-ray CT apparatus includes: a base; a main frame including a pair of tilt shafts, the main frame being supported in a tiltable manner by the base with a pair of bearings interposed in between, the bearings configured to rotatably support the respective tilt shafts; an X-ray tube and an X-ray detector positioned to face each other; an annular rotor configured to hold the X-ray tube and the X-ray detector, the rotor rotatably supported by the main frame with a bearing interposed in between; and a pair of reinforcement members extended from the main frame. One ends of the pair of tilt shafts are fixed to the main frame, and the other ends of the pair of tilt shafts are fixed to the respective reinforcement members.03-18-2010
20090022269RADIATION IMAGING APPARATUS - A radiation imaging apparatus that performs radiation imaging of a breast of a subject, which includes a table for laying down the subject; a receiving section that receives a breast of the subject laid on the table in a supine position; a radiation imaging section including a radiation emission unit and a radiation detection unit each located at a position opposing to each other being interposed by the breast of the subject received in the receiving section; and a drive unit that shifts the receiving section to a position suitable for imaging the breast of the subject.01-22-2009
Entries
DocumentTitleDate
20110176654SYSTEM AND METHOD FOR TRANSFERRING DATA IN A COMPUTED TOMOGRAPHY APPARATUS - In a method and system for data transfer in a computed tomography apparatus having a gantry with a rotatable part and a stationary part, at least one device is provided for energy transfer between the rotatable part and stationary part of the gantry and at least one PLC (Power Line Communication) component is provided for data transfer between the rotatable part and the stationary part of the gantry via at least one device for energy transfer.07-21-2011
20090202034Method for three-dimensional image reconstruction of a dynamically moved object from data of an imaging device as well as associated imaging device - The invention relates to a method for three-dimensional image reconstruction of a dynamically moved object from projection data of an imaging device comprising: a) determining a reference volume from the projection data which simulates a similar static object instead of the dynamically moved object; b) assigning the projection data to at least two disjoint consistent subsets, with a volume part reconstruction of the dynamically moved object being undertaken for each subset from projection data assigned to the subsets; c) applying a transformation to the respective volume part reconstructions representing a dynamic movement of the object; d) comparing the volumes of the transformed part reconstructions with a corresponding part of the reference volume, whereby, depending on the comparison, result step c) may be at least partly repeated; and e) summing the volume part reconstructions resulting from step c) and d) to form an overall three-dimensional image reconstruction.08-13-2009
20100020918X-RAY COMPUTED TOMOGRAPHY APPARATUS - An x-ray computed tomography apparatus has one anode ring in a vacuum housing surrounding an examination volume, wherein a focus of an x-ray source revolves on the anode ring to expose the examination volume with an x-ray beam from different directions, and a detector system arranged on a rotating frame that can rotate around a system axis. The detector system serves to detect the x-ray radiation exiting from the examination volume, wherein the detector system and the focus can rotate around the system axis synchronously and in the same rotation direction with a rotation angle offset by 180°. The apparatus also includes a computer to process the measurement values acquired by the detector system. The anode ring can be driven such that it rotates around the system axis, and the rotation direction of the anode ring and the rotation direction of the focus around the system axis are opposite while a rotation of the focus around the system axis ensues.01-28-2010
20130044855MEDICAL COMPUTED TOMOGRAPHY IMAGING APPARATUS FOR IMAGING EXTREMITIES - The invention relates to a medical computed tomography imaging apparatus for imaging extremities, which apparatus includes a support construction (02-21-2013
20090196393Interior Tomography and Instant Tomography by Reconstruction from Truncated Limited-Angle Projection Data - A system and method for tomographic image reconstruction using truncated limited-angle projection data that allows exact interior reconstruction (interior tomography) of a region of interest (ROI) based on the linear attenuation coefficient distribution of a subregion within the ROI, thereby improving image quality while reducing radiation dosage. In addition, the method includes parallel interior tomography using multiple sources beamed at multiple angles through an ROI and that enables higher temporal resolution.08-06-2009
20100014628X-RAY CT APPARATUS - An X-ray CT apparatus comprising: a scanner unit for rotating one or more X-ray sources for applying X-ray beams having different energy spectra to an object, and detectors disposed opposed to the X-ray sources for detecting transmitted X-ray data on the object, around the object while applying X-rays, reconstructing means for reconstructing a tomogram of the object by acquiring transmitted X-ray data on the object including the two or more different energy spectra by using the scanner, and display means for displaying the reconstructed tomogram; the X-ray CT apparatus further comprising input means for inputting information on an identification tissue of the object to be identified and a separate tissue to be separated from the identification tissue from the tomogram and scanning condition determining means for determining the scanning condition for identifying the identification tissue from the tomogram.01-21-2010
20100014627METHOD AND APPARATUS FOR CT IMAGE COMPRESSION - A method for compressing a CT-reconstructed image includes obtaining a reconstructed image to be compressed, wherein the reconstructed image includes an area within field of view and an area outside field of view. The method also includes determining, according to the preset CT value classification templates, which type of CT value classification template the CT value of each of the pixels in the area within field of view in the image belongs to, and compressing the pixel data that belong to the respective CT value classification templates according to the CT value classification templates and compression methods determined for the respective classification templates.01-21-2010
20100080339MODELING OF THE POINT-SPREAD-FUNCTION IN SINGLE-PINHOLE AND MULTI-PINHOLE SPECT RECONSTRUCTION - A system and method for reconstructing single photon emission computed tomography data acquired with a pinhole collimator includes sub-dividing each voxel in the imaging target object space into sub-voxels and sub-dividing each of the detector bins in the gamma camera detector into sub-bins, connecting the centers of each of the sub-voxels to each of the detector sub-bins through a pinhole provided in the pinhole collimator by ray tracing and for each ray connecting the centers of each of the sub-voxels to each of the detector sub-bins, the transmission probability is calculated by analytically solving the intersections between the ray and the pinhole surfaces. Then, a geometric-response-function of the pinhole collimator is computed which is then convolved with the intrinsic-response-function of the detector to obtain the PSF.04-01-2010
20100080338MEDICAL X-RAY CT APPARATUS - In a medical X-ray CT apparatus, a rotary portion is rotated, and a wind is produced inside the apparatus by the rotation of the rotary portion. An expanded cover portion is forced to vibrate by the wind, and noise is produced. The expanded cover portion is provided with at least one curved member including both ends. The curved member is arranged to extend along a virtual projection line obtained by geometrically projecting a virtual straight line connecting, to each other, the two ends fixed to an outer peripheral edge of an opening of the expanded cover portion onto a surface of the expanded cover portion, and the vibration of the expanded cover portion is reduced.04-01-2010
20110194668X-RAY CT APPARATUS AND METHOD THEREOF - In an X-ray CT apparatus 08-11-2011
20090122952X-RAY CT APPARATUS - The present invention provides an X-ray CT apparatus capable of obtaining each tomographic image indicative of X-ray tube voltage dependent information of a subject with the optimum image quality by less reduced exposure. The X-ray CT apparatus includes device for setting a plurality of X-ray tube voltages and sets imaging conditions used in the photography using the respective X-ray tube voltages in such a manner that respective image noise of tomographic images photographed at the X-ray tube voltages become substantially identical to one another. The setting of the imaging conditions is the setting of X-ray tube currents. The X-ray tube currents are set based on geometrical characteristic amounts of the subject determined from each scout image in such a manner that the respective image noise of the tomographic images photographed at the plurality of X-ray tube voltages become substantially identical to one another.05-14-2009
20100119032PORTAL AND REAL TIME IMAGING FOR TREATMENT VERIFICATION - A system for radiotherapy includes a first imaging system and a second imaging system. The first imaging system generates projection images of an area of interest of an object, and the second imaging system generates portal images of the area of interest of the object synchronously with the generation of the projection images. The radiotherapy system further includes a processing system that receives data associated with the projection images and data associated with the portal images and reconstructs 3D and 4D portal images from the projection images and the portal images.05-13-2010
20100074393BEAM FILTER, PARTICULARLY FOR X-RAYS - The invention relates to a beam filter (03-25-2010
20100074392X-RAY TUBE WITH MULTIPLE ELECTRON SOURCES AND COMMON ELECTRON DEFLECTION UNIT - It is described an X-ray tube (03-25-2010
20090141853PROTECTIVE SHIELD FOR CT SCANNING MACHINE - The protective shield protects a computerized tomography (CT) scanning machine from liquids and other contaminants that may spill or leak during the scanning process. The protective shield, for example, includes a central section that provides for easy positioning in and covering of the gantry opening of the CT scanning machine. The central section, for example, has outer edges with a plurality of hinged panels allowing the protective shield to sit generally flush against the CT scanning machine.06-04-2009
20130077737SYSTEM AND METHOD FOR CONE BEAM COMPUTED TOMOGRAPHY - A cone beam computed tomography system with a horizontally disposed, cylindrical gantry and a method for its use are provided. The cylindrical gantry includes a rotatable cylindrical frame fixed to a support frame. A cone beam X-ray source and X-ray detector are mounted to the circumference of the cylindrical frame at diametrically opposed positions. The cylindrical frame is actuated to revolve the X-ray source-detector arrangement around a horizontal axis, thereby scanning a recumbent subject positioned in the aperture of the cylindrical frame.03-28-2013
20130039456MEDICAL X-RAY IMAGING APPARATUS - The invention relates to a medical x-ray imaging apparatus which includes a support construction (02-14-2013
20100046695APPARATUS AND METHOD FOR ACQUIRING SECTIONAL IMAGES - Disclosed is a computer implemented method of interrogating volumetric data, the method including the steps of: defining a reference surface relative to the volumetric data; providing an interrogation window lying in a movable interrogation plane intersecting the reference surface and the interrogation window intersecting the volumetric data, said interrogation plane having a pole lying in it about which pole said interrogation plane is rotatable, wherein movement of the interrogation plane provides a corresponding movement of the interrogation window; for each movement of the interrogation plane, determining the point of intersection of said pole and said reference surface, determining the relative angle of rotation of said interrogation plane about said pole and determining the angle of inclination of said pole to said reference surface; and on the basis of said determinations, providing a sectional image through the volumetric data corresponding to the position of the interrogation window within the volumetric data. Also disclosed is a computer system for implementing the method according to any one of the preceding claims, the system includes a processor for performing the steps of the method and a visual display for displaying said sectional image.02-25-2010
20090316853BRILLIANT X-RAYS FOR CASTING INSPECTION RADIOGRAPHY AND COMPUTED TOMOGRAPHY - A brilliant x-ray inspection device comprises a brilliant x-ray source and a detector. The brilliant x-ray source generates mono-energetic, narrow beam x-rays at an identified energy. A portion of an object is positioned within a path of the mono-energetic, narrow beam x-rays. The detector generates brilliant x-ray data describing the object in three dimensions based on results of the x-ray scan of the object. The brilliant x-ray inspection device then generates a set of brilliant x-ray images of the portion of the object. The features of the object are identified based on the set of brilliant x-ray images.12-24-2009
20130188767Radiotherapy Apparatus - Intra-fraction movement of the patient puts at risk sensitive regions that are near to a radiation dose. In a radiotherapy system that delivers a dose as a series of discrete sub-doses, an initial CT scan is performed to determine the patient's position, after which the sub-doses that are directed to regions within a preset distance of a sensitive structure are performed first, while the sub-doses directed to regions that are more remote from a sensitive structure are performed later.07-25-2013
20100329415Method to inspect a blade - A method of inspecting a quality of a blade, especially of a wind-turbine-blade, is provided. At least parts of the blade are inspected by a computer-tomography-method using radiation. The radiation is directed through the blade for the inspection. A transmitter sends the radiation through the blade. A receiver receives the sent radiation after its passing through the blade. The position of the transmitter, of the receiver and/or of the blade is changed in relation to each other in order to perform the inspection of the blade.12-30-2010
20100329414IMAGE GUIDED RADIATION THERAPY - Radiation therapy of a lesion in a part of a patient is carried out by maintaining the patient on a patient support table in fixed position using an immobilization device while the table is rotated between a magnetic resonance imaging system, a CT imaging system for generating a 360 degree scanned image of the patient at the location of the lesion and the radiation therapy system for generating a beam of radiation for treatment of the lesion and for scanning the beam 360 degrees around the lesion. The MR image locates the lesion and the CT system is used to calculate the treatment. Registration between the MR image, the CT image and the radiation treatment is provided by the fixed position of the part of the patient on the table which is held fixed using an immobilization system suitable for the part concerned which may include a molded head mask where the head is involved.12-30-2010
20100329413COMPACT MICROBEAM RADIATION THERAPY SYSTEMS AND METHODS FOR CANCER TREATMENT AND RESEARCH - The present subject matter relates to compact, non-synchrotron microbeam radiation therapy (MRT) systems and methods for cancer research and treatment based on a carbon nanotube distributed x-ray source array technology. The systems and methods can deliver microscopically discrete x-ray radiation at peak dose rate of 10 Gy per second or higher. The x-ray radiation can be provided by a spatially distributed x-ray source array. The technology can be used, for example and without limitation, for human cancer treatment, for intra-operative radiation therapy, and for pre-clinical cancer research on animal cancer models.12-30-2010
20090257549Method for preparing reconstructed CT image data records and CT system - A method and CT system are disclosed for preparing reconstructed CT image data records. In at least one embodiment of the method, an initial material distribution of an examination object is determined from CT data records determined from among at least two different spectral weightings with local energy-determined attenuation values, and local measurement-spectrum-dependent weighting functions are determined using this material distribution, enabling local measurement-spectrum-dependent attenuation functions to be calculated, and the distribution of local reference materials to be determined, with the help of plausibility considerations, from a list of reference materials over at least one specified region of interest in the examination object on the basis of previously calculated local measurement-spectrum-dependent attenuation functions.10-15-2009
20130051518MEDICAL COMPUTED TOMOGRAPHY IMAGING APPARATUS - The invention relates to a medical computed tomography imaging apparatus which includes a support construction (02-28-2013
20130051517MEDICAL COMPUTED TOMOGRAPHY IMAGING APPARATUS - The invention relates to a medical computed tomography apparatus which includes a support construction (02-28-2013
20130051516NOISE SUPPRESSION FOR LOW X-RAY DOSE CONE-BEAM IMAGE RECONSTRUCTION - Embodiments of methods and/or apparatus for 3-D volume image reconstruction of a subject, executed at least in part on a computer for use with a digital radiographic apparatus can obtain image data for 2-D projection images over a range of scan angles. For each of the plurality of projection images, an enhanced projection image can be generated. In embodiments of imaging apparatus, CBCT systems, and methods for operating the same can, through a de-noising application based on a different corresponding object, maintain image reconstruction characteristics (e.g., for a prescribed CBCT examination) while reducing exposure dose, reducing noise or increase a SNR while an exposure setting is unchanged.02-28-2013
20130051515CRASER DEVICE, IMAGING SYSTEM AND METHOD - A craser device, imaging system utilizing a craser device, and a method of imaging. The craser device includes a gain medium with excited gain medium atoms that emit x-ray and/or gamma-ray photons, a transmission medium abutting the gain medium, and a reflecting mirror comprising one or more lower refractive index layers and abutting the transmission medium. The transmission medium has a higher refractive index than the gain medium and at least one of the materials in the reflecting mirror. The x-ray and/or gamma-ray photons are confined to the transmission medium via total internal reflection and interact multiple times with the excited gain medium atoms through evanescent waves producing amplified stimulated emission leading to formation of a high intensity incoherent or coherent x-ray and/or gamma-ray beam.02-28-2013
20110058643SYSTEM AND METHOD FOR GENERATING X-RAYS - In one embodiment, an X-ray tube is provided. The X-ray tube comprises at least one thermionic cathode configured to generate an electron beam, a target assembly configured to generate X-rays when impinged with the electron beam emitted from the thermionic cathode, a high voltage supply unit for establishing an output voltage across the thermionic cathode and the target assembly for establishing an accelerating electric field between the thermionic cathode and the target assembly and a mesh grid disposed between the thermionic cathode and the target assembly, the mesh grid configured to operate at a voltage so as to lower the electric field applied at the surface of the thermionic cathode. Further, the voltage at the mesh grid is negatively biased with respect to the voltage at the thermionic cathode.03-10-2011
20130094624METHOD FOR CORE THERMAL CONDUCTIVITY DETERMINATION - A method for core sample effective thermal conductivity provides for scanning a core sample by X-ray micro-computed tomography scanner and transferring a three dimensional scan image to an image analysis computer for processing. Then a layer thickness to be analyzed is set and a layer with maximum thermal resistance is defined within the image. The value of core effective thermal conductivity is defined by the allocated layer.04-18-2013
20130064343Method and Apparatus for Determining Three-Dimensional Reconstruction of an Object - A computer-implemented method for determining a 03-14-2013
20080298537PLANAR X-RAY TOMOSYNTHESIS DEVICE - The present invention is claimed as an apparatus and a method for acquiring multi-angle images for a region of interest. The apparatus includes a x-ray source producing a beam of radiation; a surface to support the region of interest that moves the region of interest to at least one location; and a x-ray detector that is moved to location in order to receive a portion of the beam that has passed through the region of interest, the x-ray detector producing from the received portion of the beam an image. In another embodiment a plurality of detectors are used instead and they can each receive a portion of the beam that has passed through the printed circuit board.12-04-2008
20090028288X-RAY COMPUTED TOMOGRAPHY APPARATUS - An X-ray computed tomography apparatus includes a gantry, a reconstruction processing unit which generates first volume data on the basis of a projection data set which covers an angle range of 180°±a fan angle and also generates second volume data on the basis of a projection data set which covers an angle range of 360°, a correction data generating unit which generates correction data for reducing a cone beam artifact on the basis of a difference between the first volume data and the second volume data, and a correction unit which corrects the first volume data on the basis of the correction data.01-29-2009
20080304617Method for generating a 3D reconstruction of a body - The invention relates to a method for generating a 3D reconstruction of an especially large body that cannot be captured by a single projection by capturing at least two projections, which together capture the body, at each of the positions taken up by a C-arm X-ray unit. Data from the two projections is projected onto a virtual detector and the data from the virtual detector is then used for the filtered back projection procedure. It is assumed here that the real source remains motionless and that only the detector moves. A virtual detector D12-11-2008
20080304616Segmenting colon wall via level set techniques - Various level set techniques can be used to automatically segment the colon wall, including identifying the colon wall outer boundary. A speed image can be used during level set processing. For example, the speed image can be generated via inverting the gradient perpendicular to the segmented inner boundary of the colon wall. The techniques can be useful for determining wall thickness, which can be used to classify polyp candidates, diagnose diseases of the colon, and the like.12-11-2008
20130129036ARRANGEMENT AND METHOD FOR THE ACTIVE VIBRATION DAMPENING OF AN X-RAY EMITTER FROM OUTSIDE OF THE X-RAY EMITTER - An arrangement for the active vibration compensation of an x-ray emitter includes a counteracting vibration generation unit arranged outside of the x-ray emitter for reducing a vibration produced during operation of the x-ray emitter. The counteracting vibration generation unit is actively connected to the x-ray emitter and generates a counteracting vibration that is phase-shifted by 180 degrees relative to the vibration. By attaching active counteracting vibrators in the vicinity of the vibration generator, vibrations generated by the x-ray emitter are directly reduced at the source. A further transfer of vibrations to other system parts such as a C-arm 6 is reduced and/or prevented.05-23-2013
20110033023TILT IMAGE SCAN METHOD AND RECONSTRUCTION METHOD AND APPARATUS - A tilt image scan method includes acquiring reconstruction parameters of a target tilt image, determining on the basis of the reconstruction parameters the minimum beam widths of the rays that should be emitted from the tube at each angle, and controlling the collimator at each angle where the tube locates so that the beam width after the beam passes through the collimator is equal to the corresponding minimum beam width thereby scanning the subject.02-10-2011
20100189210X-RAY CT SYSTEM, CHEMICAL LIQUID INJECTOR, AND CT SCANNER - An X-ray CT system (07-29-2010
20080267342Efficient Iterative Four-Dimensional Cardiac Cone-Beam Ct Reconstruction - The increasing cone angle of current high-end and future CT systems leads to a decrease in image quality if approximate cone-beam reconstruction methods are used. According to an exemplary embodiment of the present invention, an iterative four-dimensional cardiac CT reconstruction is provided, in which phase volumes are selected from the four-dimensional data set, each having the same spatial volume at different phase points. Corresponding voxels inside these phase volumes are then forward projected onto the same projection. After calculation of a different projection, these voxels are updated. This may provide for an efficient implementation of an iterative four-dimensional cardiac cone-beam CT reconstruction.10-30-2008
20110080991X-RAY DEVICE FOR CONTROLLING A DC-AC CONVERTER - The invention provides an X-ray device for controlling a DC-AC converter, wherein the DC-AC converter is adapted for supplying a resonant circuit and a transformer (04-07-2011
20110129055COMPUTED TOMOGRAPHY METHOD, COMPUTER SOFTWARE, COMPUTING DEVICE AND COMPUTED TOMOGRAPHY SYSTEM FOR DETERMINING A VOLUMETRIC REPRESENTATION OF A SAMPLE - A computed tomography method for determining a volumetric representation of a sample comprises using reconstructed volume data of the sample from x-ray projections of the sample taken by an x-ray system, computing a set of artificial projections of said sample by a forward projection from said reconstructed volume data , and determining, essentially from process data of said reconstruction including said reconstructed volume data and/or said x-ray projections, individual confidence measures for single voxels of said volume data based on calculating, for each of said measured x-ray projections, the difference between the contribution of this measured x-ray projection to the voxel under inspection and the contribution from a corresponding artificial projection to the voxel under inspection.06-02-2011
20090129536X-RAY CT APPARATUS AND MYOCARDIAL PERFUSION IMAGE GENERATING SYSTEM - An apparatus includes a transformation table acquiring unit, a blood-flow information acquisition unit and a blood-flow image generating unit. The transformation table acquiring unit obtains a transformation table for transforming unspecified information representing a concentration of a contrast medium in a myocardium into an unspecified blood flow value image based on a CT image acquired in a concentration transition period. The blood-flow information acquisition unit obtains information representing the concentration of the contrast medium based on a CT image acquired during a constant concentration period. The blood-flow image generating unit generates a blood flow value image based on the information representing the concentration of the contrast medium according to the transformation table.05-21-2009
20110299652METHODS, APPARATUS, AND COMPUTER-PROGRAM PRODUCTS FOR INCREASING ACCURACY IN CONE-BEAM COMPUTED TOMOGRAPHY - Disclosed are methods, systems, and computer-product programs for increasing accuracy in cone-beam computed tomography.12-08-2011
20110280363METHOD OF FAST CURRENT MODULATION IN AN X-RAY TUBE AND APPARATUS FOR IMPLEMENTING SAME - An X-ray tube includes a target and a cathode assembly. The cathode assembly includes a first filament configured to emit a first beam of electrons toward the target, a first gridding electrode coupled to the first filament, a second filament configured to emit a second beam of electrons toward the target, and a second gridding electrode coupled to the second filament.11-17-2011
20110286573METHOD AND APPARATUS FOR LARGE FIELD OF VIEW IMAGING AND DETECTION AND COMPENSATION OF MOTION ARTIFACTS - A method and apparatus are provided to improve large field of view CT image acquisition by using at least two scanning procedures: (i) one with the radiation source and detector centered and (ii) one in an offset configuration. The imaging data obtained from both of the scanning procedures is used in the reconstruction of the image. In addition, a method and apparatus are provided for detecting motion in a reconstructed image by generating a motion map that is indicative of the regions of the reconstructed image that are affected by motion artifacts. Optionally, the motion map may be used for motion estimation and/or motion compensation to prevent or diminish motion artifacts in the resulting reconstructed image. An optional method for generating a refined motion map is also provided.11-24-2011
20080273651Methods and apparatus for reducing artifacts in computed tomography images - We present an iterative method for reducing artifacts in computed tomography (CT) images. In each iteration, constraints such as non-negativity are applied, then the image is blurred to guide convergence to a smoother image. Next, the image is modified using an algebraic reconstruction algorithm to try to match the projection data to within the experimental error. A mask is calculated which specifies which parts of the image to update during each iteration. The mask allows us to first solve regions of the image that are determined by rays with low photon counts (and thus high error). Then, regions of the image determined by rays with higher photon counts (and thus lower error), are solved using those ray sums. Reducing CT scan artifacts results in clearer and higher resolution images, faster scan times, and less radiation use.11-06-2008
20090135993Computed tomography method - The invention relates to a computed tomography method. The airgap associated with a projection direction is determined by determining, in the projection images, edge pixels which map object edges on a detector. By back-projecting the edge pixels in an object image space it is possible to determine an envelope polygon for an outline contour of the examination object. The width of the airgap associated with a specific projection direction can then be determined on the basis of the envelope polygon. Exact knowledge of the current airgap serves to improve the scattered radiation correction.05-28-2009
20100034340SINGLE SENSOR MULTI-FUNCTIONAL DENTAL EXTRA-ORAL X-RAY IMAGING SYSTEM AND METHOD - A multi-functional dental extra-oral x-ray imaging system includes a conventional x-ray source and manipulator to control the movement of the x-ray source by translating and rotating, a real time multiple frame producing x-ray imaging device and at least two different exposure profile programs, whereas one of such profiles produces a standard panoramic image and a second of such profiles produces an angled or transverse slice to a the panoramic image. A third exposure profile program produces a substantially linear projection of the human skull by combining two linear projections, one for the right and one for the left part of the head. The sensor is a linear direct conversion operating preferably in the frame mode and producing more than 100 fps.02-11-2010
20080240337Model-Based Heart Reconstruction and Navigation - A method to obtain a patient based organ model from patient data, having steps of obtaining a computerized organ model based upon at least one data set of patients, the computerized organ model having a set of classifiers that are used to determine physical parameters of the patients heart, placing the patient in a diagnostic scanner device, taking representative data images of a patients organ while changing position of the image scan, the data images taken with ECG synchronization; and preparing the patient based organ model by evaluating the representative data images of the patients organ with the set of classifiers in the computerized organ model.10-02-2008
20090052610Intraoperative monitoring of temperature-induced tissue changes with a high-resolution digital X-ray system during thermotherapy - A method of thermally inducing and monitoring changes to localized regions of tissue illuminating a volume of tissue with a first beam of X-rays, detecting the portions of the first beam of X-rays that passed through the volume of tissue, generating a first X-ray image signal from the portions of X02-26-2009
20090147908Compression of computed tomography data - Methods, computer-readable mediums, apparatuses, and systems are provided. In one embodiment, the method acquires gain data for a view. The gain data is stored for subsequent use. Thereafter, the method acquires raw data for the view. For detectors in the view, the method compares the raw data to the gain data to determine if the result exceeds a threshold. Generally, information that exceeds the threshold is valid data. The method transmits only the valid data. Embodiments of the invention also include other methods, computer-readable mediums, apparatuses, and systems that contain features similar to the features in the above described method.06-11-2009
20080317195MEDICAL-DIAGNOSIS ASSISTING APPARATUS, MEDICAL-DIAGNOSIS ASSISTING METHOD, AND RADIODIAGNOSIS APPARATUS - A medical-diagnosis assisting apparatus and a radiodiagnosis apparatus that include a simulation function prior to an examination/treatment, and a guide function during an examination/treatment are provided. Specifically, an extracting unit that extracts image data of a blood vessel portion to be an observation target from three-dimensional image data acquired by imaging a subject, a display unit that can display a three-dimensional image of the extracted blood vessel portion, a display-direction setting unit that displays the three-dimensional image of the extracted blood vessel portion on a display unit at a display angle specified by a user, and a simulation-image creating unit that simulates a course of a catheter when the catheter is to be inserted into the extracted blood vessel portion, and overlays a maker that indicates a position and a moving direction of the catheter on the three-dimensional image of the blood vessel portion are included.12-25-2008
20080310581Medical diagnostic system - In a method for operating a medical diagnostic system including an irradiating examination machine and a contrast agent supplying machine, at least one operational parameter is assigned to the examination machine and at least one application parameter is assigned to the contrast agent supplying machine. In at least one embodiment disclosed herein, the operational parameters and the application parameters are concurrently, or even simultaneously, displayed via a display apparatus.12-18-2008
20090141852Method For Generation of SPECT Trajectory Data From CT Data - A method for optimizing the scanning trajectory of a radiation detector device, e.g., a SPECT scanning device, about an object generally includes: obtaining object image data using a different imaging modality, e.g., a CT scanning device, determining a maximum object boundary based on the image data, calculating an optimal scan trajectory of the SPECT scanning device relative to the object based on the maximum object boundary, scanning the object with the SPECT scanning device along the optimal scan trajectory to detect gamma photons emanating from the object, from which an image can be reconstructed from the detected gamma photons. Preferably, the SPECT device includes at least two detectors arranged at a pre-selected angle relative to one another and the optimal scan trajectory minimizes the distance between the detectors and the object while maximizing the geometric efficiency of the detectors relative to the object.06-04-2009
20100266096GANTRY COOLING - A medical imaging apparatus (10-21-2010
20120189092Imaging Method with Improved Display of a Tissue Region, Imaging Device, and Computer Program Product - An imaging method with an improved display of a tissue region generates a first visualization and a second visualization from projection recordings that were recorded at different angles. A radiologist is enabled to mark a region in the first visualization, which region is displayed by way of the second visualization.07-26-2012
20120189091Imaging Method for Rotating a Tissue Region - An imaging method, more particularly a mammography method, includes rotating a tissue region in the virtual domain. Projection recordings of a tissue region are generated by way of radiation emitted by an emitter, which radiation is captured by a detector after passing through the tissue region. Slice images are generated from the projection recordings. A slice image region corresponding to a partial tissue region is rotated virtually. The virtually rotating partial tissue region can be displayed as a set of virtual projections.07-26-2012
20090207964METHOD AND SYSTEM FOR RECONSTRUCTING CONE-BEAM PROJECTION DATA WITH REDUCED ARTIFACTS - A method for generating an image of an object is provided. The method comprises acquiring projection data at one or more projection views along a circular scan trajectory and generating a corrected projection dataset based upon a weighted derivative applied to a subset of the projection data. The method further comprises backprojecting the corrected projection dataset along one or more projection rays associated with one or more of the projection views, to generate a reconstructed image of the object.08-20-2009
20090207965DATA PROCESSING APPARATUS, X-RAY APPARATUS, AND DATA PROCESSING METHOD - An example of the present invention is a data processing apparatus including, a saving part configured to save three-dimensional data of a subject, a two-dimensional image display part configured to display three-dimensional data of the subject as a two-dimensional image, a designation part configured to designate coordinate information associated with a specific coordinate point on the two-dimensional image, a specifying part configured to specify, based on the coordinate information designated on the two-dimensional image, coordinate information on the corresponding three-dimensional data, and a calculation part configured to calculate a view angle of the subject on the basis of the coordinate information on the three-dimensional data.08-20-2009
20100080340AIR BEARING TO SUPPORT A BODY - An air bearing has a rotor having a circularly curved radial rotor bearing surface along its circumferential direction. The air bearing also has a stator having at least one radial stator bearing surface partially enclosing the rotor in the circumferential direction. The radial stator bearing surface is curved according to a profile following the circumferential direction of the rotor and is fashioned to generate an air gap between it and the radial rotor bearing surface so that, upon operation, the rotor is borne, supported by an air current in the air gap. The profile shapes the air gap such that, at a starting temperature that deviates from an operating temperature, the air gap has a smaller thickness (measured in the radial direction) in a second region of the radial stator bearing surface in comparison to a first region of the radial stator bearing surface along the circumferential direction.04-01-2010
20090086882Method and computational unit for measuring the flow rate of a contrast agent in a vessel of a patient - A method and a computational unit are disclosed for measuring the flow rate of a contrast agent in a vessel of a patient by way of a computed tomography examination. The patient is scanned by x-rays emitted in a fan-shape from two planes and the absorption from a multiplicity of rotational angles is determined while the contrast agent propagates through the at least one vessel. According to at least one embodiment of the invention, a three-dimensional data record of local absorption data with the vessel which can be filled by a contrast agent is reconstructed; a set of x-rays which pass through this vessel is determined for a multiplicity of temporally subsequent rotational angles of the x-rays. By determining the changing absorption values along this vessel from the temporally subsequent vessel/ray-sets, the propagation velocity of the contrast agent in this vessel can be determined from the spatial and temporal change in the absorption values in this vessel.04-02-2009
20090067569GAIN CORRECTION FOR A CT SYSTEM - A method for imaging unknown objects in a computed tomography (CT) system, comprising determining ray gain for a known object is provided. A CT reconstruction is performed with the known object to obtain reconstructed values. Ideal values are obtained for pixels of the known object. An error related to a difference between the reconstructed values and the ideal values is generated. A ray gain is estimated that reduces the error.03-12-2009
20080310580NUCLEAR MEDICAL DIAGNOSIS APPARATUS - A nuclear medial diagnosis apparatus is used for performing diagnosis by administering a medicine marked with a radioactive isotope into an examinee and by using an image obtained by detecting gamma rays emitted from a particular organ or tumor where the medicine is accumulated. An image (an image created by an image creation unit) is created by a signal (a signal as an output from a radiation detector) corresponding to the energy of the gamma ray detected by a radiation detector. The image includes a contamination component attributed to gamma scattering in the radiation detector. An image correction operation unit performs a convolution operation to obtain a contamination image. The contamination image is subtracted by a corrected image creation unit. Thus, it is possible to prevent image degradation by the gamma ray scattering in the radiation detector.12-18-2008
20090103676DISPLAY CONTROL APPARATUS, RADIATION IMAGING APPARATUS, AND RADIATION IMAGING SYSTEM - In a display control apparatus, an image receiving portion receives a plurality of images sequentially transmitted from an X-ray imaging apparatus based on a transmission order determined by a transmission-order determining portion, and a capture-order information receiving portion also receives, from the X-ray imaging apparatus, capture-order information indicating a capture order in which each of the images was captured by the X-ray imaging apparatus. The images received by the image receiving portion are stored in an image storage memory. A display controller controls displaying of the images stored in the image storage memory on a display apparatus based on a transmission order for transmitting the images or the capture-order information in accordance with an input imaging condition and an operating status of the X-ray imaging apparatus.04-23-2009
20090041179Method for a three-dimensional representation of a moving structure - The invention relates to a method for three-dimensional representation of a moving structure by a tomographical method. Projection images are recorded by an image recording unit during a rotational run from recording angles between a start angle and an end angle, with a three-dimensional image data reconstructed from the projection images, with a first perfusion measurement with a first contrast agent injection and a first rotational run and with a further perfusion measurement with a further contrast agent injection and a further rotational run, which is started after the preceding perfusion measurement has concluded, with the start time and/or the start angle of the additional rotational run deviating from one another in respect of the time of the contrast agent injection. The method enables a functional three-dimensional time-resolved imaging of perfusion processes with the aid of flexible C-arm x-ray devices, which allow a functional imaging in an interventional environment.02-12-2009
20090041178METHOD FOR PRODUCING A THREE-DIMENSIONAL DIGITAL X-RAY IMAGE - The present invention relates to a method for producing a three-dimensional digital x-ray image by using digital x-ray images taken of the object from at least two different directions as input for a reconstruction algorithm. In the method, at least one of the images used as input is taken as a tomosynthetic slice image of a region of interest (02-12-2009
20110200164X-RAY DIFFRACTION AND COMPUTED TOMOGRAPHY - An imaging system combines CT and XRD measurements, both measuring the XRD diffraction and the absorption as a function of energy. A goniometer 08-18-2011
20080212734Correction of Non-Linearities in an Imaging System by Means of a Priori Knowledge in Radiography - The invention relates to a method for online correction of non-linearities in the imaging system during the data acquisition in industrial computer tomography (CT). The above provides a method for the provision of corrected projection data as an improved CT reconstruction, whereby measuring beams (q) are emitted from a radiation source (Q) which pass through the sample (09-04-2008
20100215140METHODS AND SYSTEMS TO FACILITATE CORRECTING GAIN FLUCTUATIONS IN ITERATIVE IMAGE RECONSTRUCTION - Methods and systems for reconstructing an image are provided. The method includes performing a tomographic image reconstruction using a joint estimation of at least one of a gain parameter and an offset parameter, and an estimation of the reconstructed image.08-26-2010
20090003511Device and Method For Identifying Occlusions - A method of identifying one or more occlusions in vasculature located in a region of interest, includes extracting vasculature from the region of interest; identifying a subject geometry of the extracted vasculature; and comparing the subject geometry to a predetermined geometry to identify a blockage. A device for identifying one or more occlusions in vasculature located in a region of interest is also presented.01-01-2009
20100128838COMPUTED TOMOGRAPHY METHOD AND SYSTEM - An method of computed tomography is disclosed herein. The method includes acquiring an axial dataset and acquiring a helical dataset as part of an acquisition protocol. A computed tomography system is also disclosed.05-27-2010
20100128839Structure and Procedure for X-Ray CT Guided Cancer Treatment - A radiation apparatus includes a first radiation source configured to generate radiation suitable for therapeutic treatment, and a structure for supporting a body. The structure comprises a curved surface adapted to receive a body portion to be treated during a therapeutic treatment.05-27-2010
20080273652Automatic Detection and Quantification of Plaque in the Coronary Arteries of Subjects from CT Scans - A method automatically detects and quantifies arterial plaque (hard plaque, soft plaque or both) in the coronary arteries of the heart from CT images. The method uses plaque definitions based on subject specific in vivo blood/muscle and fat density measurements, subject specific voxel statistical parameters and 2-D and 3-D voxel connectivity criteria to automatically identify the plaques. The locations of the major arteries are determined in a 3-D coordinate system; and the specific coordinates of the detected plaques are displayed in a plaque map for follow-up exams or ease in plaque review, editing and reporting the results.11-06-2008
20080292045X-RAY CT APPARATUS AND X-RAY CT SCANNING METHOD - The present invention is directed to realize an X-ray CT apparatus for properly performing contrast imaging. An X-ray CT apparatus includes an imaging unit and a control unit for controlling the imaging unit. The control unit includes: a first control unit for performing a monitoring scan to monitor arrival of a contrast agent at a region of interest in a start position of a main scan in an imaging range of the main scan that is set along the body axis of the subject or a first monitoring position that is set before the start position in a scan progress direction and, on arrival of the contrast agent, starting the main scan; and a second control unit for monitoring whether or not the contrast agent has reached a region of interest in a second monitoring position provided on the forward side of the start position of the main scan in the imaging range in the scan progress direction on arrival of the main scan at the second monitoring position, when the contrast agent has reached the second monitoring position, continuing the main scan and, when the contrast agent has not reached the second monitoring position yet, performing a monitoring scan for monitoring arrival of the contrast agent.11-27-2008
20080292046Bronchopulmonary medical services system and imaging method - A bronchopulmonary medical services system is provided in order to offer medical services to a patient in a single location. In one aspect, the system is provided with a patient alignment device and a C-arm imaging device. A medical services suite may be equipped with various medical service devices such that the patient receives medical services in a single location.11-27-2008
20120294412ARRANGEMENT AND METHOD FOR ACTIVE VIBRATION DAMPING WITHIN AN X-RAY RADIATOR - In an arrangement and method for active vibration compensation of an x-ray radiator, a counter-vibration generation unit is arranged within the x-ray radiator to reduce a vibration arising during operation of the x-ray radiator. The counter-vibration generating unit is engaged in an active connection with the x-ray radiator and generates a counter-vibration that is phase-shifted by 180 degrees relative to the operational vibration. Operational vibrations generated by the x-ray radiator can be directly reduced at the point of origin by the application of active counter-vibrations in the immediate proximity of the vibration generator. Additional vibration transmission to other system parts (for example a C-arm) is thereby reduced or prevented.11-22-2012
20110007864METHOD AND APPARATUS FOR REORIENTATED RESCONSTRUCTION OF COMPUTED TOMOGRAPHY IMAGES OF PLANAR OBJECTS - A system and method for micro computed tomography (CT) reconstruction of position scan data of planar objects, such as stacked integrated circuit chips and/or PCB, that automatically determines object orientation is disclosed for a preferred orientation of the reconstructed images. The object orientation of the sinogram of the scanning data is determined such that the reconstruction may be performed with any starting position. Additionally, planar object scan reconstructions with either a higher resolution in the thickness dimension without increasing the total computation resource or a faster processing speed under a given resolution in the thickness dimension may be achieved. The tilting angle with respect to the rotation axis may also be determined to perform a image rotation after a multi-slice reconstruction or cone-beam reconstruction.01-13-2011
20110007865RADIATION THERAPY DEVICE - A radiation therapy device includes a radiation application apparatus, which is used to direct a therapeutic beam along a therapeutic beam center axis onto a target volume to be irradiated. The radiation therapy device also includes a diagnostic radiation source for diagnostic x-ray radiation, is the diagnostic radiation source being disposed eccentrically in relation to the therapeutic beam center axis in a rotatable manner on a rotation apparatus so that the diagnostic radiation source is operable to be rotated about the therapeutic beam center axis. The radiation therapy device further includes a detector for diagnostic x-ray radiation, which is used to detect the diagnostic x-ray radiation emitted from the diagnostic radiation source.01-13-2011
20080304615Method For Fleixble 3Dra-Ct Fusion - A system and method for combined processing and displaying of two data sets, originating from two different radiological methods, capable of making interim results, yielded by an operation on one of the data sets, available for further processing of the other data set. Different imaging capabilities of the employed radiological methods promote predestine the data acquired using a particular method for a particular task, e.g. the segmentation of a given type of tissue. When the combined data of both methods is displayed, clinical users benefit from the complementary information. Care has to be taken, that only relevant information is presented to the user, as to avoid irrelevant data obscuring any data of interest. Therefore, the data to be displayed is filtered based on content, e.g. the type of tissue, and on location. The invention is particularly useful with computer tomography and three-dimensional rotational angiography.12-11-2008
20080267343CT SYSTEM WITH SYNTHETIC VIEW GENERATION - A CT scanner system provides projection-like images of a patient volume. After a CT scan is obtained and a three-dimensional model of the patient is created, any synthetic view can be generated by choosing any array of projection lines, e.g. between a point and a surface (a flat plane, curved plane, spherical, etc) or between two surfaces (parallel or not) and summing across the projection lines. The synthetic projections can mimic certain traditional views, such as a ceph scan, Water's view, Caldwell's projection, etc or can provide a new view that is impossible or impractical with traditional x-ray equipment, such as a perfect parallel projection, or a projection that does not pass all the way through the patient.10-30-2008
20080240335Iterative reconstruction of tomographic image data method and system - Methods for performing image reconstruction that include deriving background projection data for an area outside a targeted field of view of a tomographic image, and reconstructing the tomographic image of the targeted field of view, wherein the background projection data is used in the reconstruction. Methods for selecting a reconstruction methodology that include determining a number of pixels in a reconstructed image for a first reconstruction methodology, determining a number of pixels in a reconstructed image for a second reconstruction methodology, comparing the number of pixels for the first reconstruction methodology and the number of pixels for the second reconstruction methodology, and selecting the reconstruction methodology for image reconstruction based on the comparison of the number of pixels. Imaging systems implementing these methods are also provided.10-02-2008
20090129537DATA ACQUISITION SYSTEM FOR PHOTON COUNTING AND ENERGY DISCRIMINATING DETECTORS - A data acquisition system including a readout Application Specific Integrated Circuit (ASIC) having a plurality of channels, each channel having a time discriminating circuit and an energy discriminating circuit, wherein the ASIC is configured to receive a plurality of signals from a semiconductor radiation detector. The data acquisition system also includes a digital-to-analog converter (DAC) electrically coupled to the ASIC and configured to provide a reference signal to the ASIC used in the generation of digital outputs from the ASIC, and a controller electrically coupled to the ASIC and to the DAC, the controller configured to instruct the DAC to provide the reference signal to the ASIC.05-21-2009
20110268244RADIATION TOMOGRAPHY METHOD - A radiation tomography method of the present invention includes: calculating a radiating timing, with reference to imaging timing correction data relating a plurality of gantry angles to a plurality of imaging timing correction amounts, on the basis of an imaging timing at which a radiation source supported by a rotating traveling gantry is arranged at a predetermined imaging angle and an imaging timing correction amount, of the plurality of imaging timing correction amounts, related to a gantry angle at which the traveling gantry is arranged at the imaging timing; and calculating, on the basis of an X-ray image imaged with a radiation radiated from the radiation source at the radiating timing, three-dimensional data of the X-ray image of a subject. According to the radiation tomography method, the X-ray image imaged with the further accurately arranged radiation can be obtained even in a case where the traveling gantry deflects depending on the gantry angle at which the traveling gantry is arranged, and thus the three-dimensional data can be obtained more accurately.11-03-2011
20120069951TOMOGRAPHIC IMAGE DISPLAYING METHOD AND APPARATUS - Provided is a tomographic image displaying method and apparatus capable of displaying a plurality of tomographic images in an easily viewable manner and enabling viewers to immediately understand a region of interest or the like. A predetermined target tomographic image is specified among a plurality of tomographic images, a weighting factor is multiplied to each of the plurality of tomographic images, and the weighted tomographic images are added to thereby generate and display a combined tomographic image. The weighting factor multiplied to the specified target tomographic image is set so as to be larger than the weighting factors multiplied to at least one of the tomographic images other than the target tomographic image.03-22-2012
20120069950METHOD AND X-RAY DEVICE FOR CREATING AN X-RAY PROJECTION IMAGE - A method and an X-ray device are disclosed for creating an X-ray projection image of a three-dimensional object under examination and for displaying the projection image. In at least one embodiment, pixel images are recorded from two different perspectives and a projection image is created by overlaying the two pixel images, wherein perspective-related offset of the mapping image pixels is taken into account, pixel-by-pixel, in relation to an imaging surface in the object under examination.03-22-2012
20090141854X-RAY CT APPARATUS - An X-ray CT apparatus is provided, having a function for deciding an X-ray imaging condition prior to scanning, the X-ray imaging condition allowing an acquisition of contrast to noise ratio appropriate for identifying a diagnostic object. Prior to the real scan, a three-dimensional model of an object is estimated from scanogram projection data of the object, a contrast to noise ratio enabling identification of the diagnostic object is calculated, based on the diagnostic object size set by an operator via an operating device when planning the scan, the three-dimensional model, and a standard imaging condition that is stored in a storage device. Then, an optimum irradiated X-ray condition (tube current and tube voltage) is calculated for achieving the contrast to noise ratio enabling identification. The X-ray condition being calculated is displayed in the form of information such as image SD value and exposure dose, under the calculated X-ray condition and under other condition.06-04-2009
20090003512Dose-guided radiation therapy using cone beam CT - A system includes acquisition of a three-dimensional cone beam image, and determination of a dose to be delivered based on the three-dimensional image and on parameters of a treatment beam to deliver the dose. Some systems may include modification of a three-dimensional cone beam image to correct for scatter radiation, and determination of a dose based on the modified three-dimensional cone beam image.01-01-2009
20080317194Pet Imaging Using Anatomic List Mode Mask - A method and apparatus are provided for reconstructing list mode data acquired during a positron emission tomography scan of an object, the data including information indicative of a plurality of detected positron annihilation events. Detected events occurring in a region of interest are identified; the identified events are reconstructed using an iterative reconstruction technique which includes a ray tracing operation to generate volumetric data indicative of the region of interest, wherein the ray tracing operation traces only image matrix elements located in the region of interest; and a human readable image indicative of the volumetric data is generated. In another aspect an image mask and a projection mask are defined correlating to the region of interest; image matrix elements located in the region of interest are determined by applying the image mask; and detected events occurring in a region of interest are identified by applying the projection mask.12-25-2008
20090052611Method and x-ray computed tomography system for visualizing at least two types of cardiac tissue: Healthy tissue and diseased tissue - A method and an x-ray computed tomography system are disclosed for visualizing at least two different types of cardiac tissue, such as normally perfused tissue, hypoperfused tissue and scarred tissue. In at least one embodiment, this is done by use of an imaging tomographic recording technique with the aid of x-ray radiation, wherein at least one cardiac region of a patient is scanned by x-ray radiation which passes through a first grating for the passing-through x-ray radiation, designed as an absorption grating, prior to reaching the patient, and at least the locally caused phase-shifts of the x-ray radiation in the cardiac region are also made detectable by using a second grating for the passing-through x-ray radiation, designed as a phase grating, downstream of the patient in the emission direction, and the spatial distribution of these shifts is measured and reconstructed, wherein an average specific phase-shift value is assigned to each spatial unit, wherein each of the abovementioned tissue types are assigned to a region of a typical specific phase-shift value and at least one region assigned to a tissue type is optically highlighted in a view of the cardiac region.02-26-2009
20090080595COMPUTED TOMOGRAPHY SYSTEM - A CT system performing reconstruction processing based on projection-image-data items obtained from a CT apparatus, wherein the CT system performs the reconstruction processing by, for example, distributing opposed projection-image-data items to a submachine as a single set.03-26-2009
20090080594DEDICATED BREAST RADIATION IMAGING/THERAPY SYSTEM - System, apparatus and methods specialized for breast and related tissue radiation therapy and imaging of a prone patient but also usable for supine patient if desired or needed. A special treatment radiation source such as a LINAC unit generates radiation of types and energy ranges specifically matched to breast tissue. Any one or more of several imaging technologies may be used to localize the tissue to be irradiated and to generate information for therapy planning, adjustment, and verification.03-26-2009
20090086883Method for creating material-selective volume images - A method for creating material-selective volume images of various material components of an object to be examined is proposed. The method is based on multi-spectral projected images captured from various directions of projection, the images being captured using an X-ray machine, and makes it possible to quantitively exactly determine the material-selective volume images by way of iteration.04-02-2009
20130121457Patient Positioning System - A system includes acquisition of a three-dimensional computed tomography image of a patient volume at a computed tomography scanner, acquisition of projection images of the patient volume located at an isocenter of a linear accelerator, and determination of a transformation between a coordinate system of the linear accelerator and a coordinate system of the three-dimensional computed tomography image based on the projection images.05-16-2013
20110222646X-Ray Imaging Apparatus - An X-ray imaging apparatus includes an X-ray generation part, an X-ray detection part, and a revolution drive mechanism. The X-ray generation part has an X-ray generator including a cathode and an anode, and emits an X-ray beam from the X-ray generator. The X-ray detection part detects the X-ray beam. The revolution drive mechanism performs X-ray imaging by revolving the X-ray generation part and the X-ray detection part around the object while the X-ray generation part and the X-ray detection part are opposed to each other with said object interposed therebetween. The X-ray imaging apparatus controls a restriction part to thereby restrict an X-ray transmission in such a manner that the focal spot size of an X-ray beam used in X-ray CT imaging of a relatively narrow imaging region is smaller than the focal spot size of an X-ray beam used in X-ray CT imaging of a relatively large imaging region.09-15-2011
20090257550Slice image display apparatus, method and recording-medium having stored therein program - A shadow area in a lung-field area of a subject is detected from tomographic images constituting a three-dimensional image representing the subject. A hilum-of-lung area in the lung-field area of the subject is detected from the tomographic images. Further, a slice image that passes through a first point that is a predetermined point in the detected shadow area, a second point that is a predetermined point in the detected hilum-of-lung area, and an arbitrary point that has been set in advance is generated. The generated slice image is displayed.10-15-2009
20090245456IMAGING METHOD AND DEVICE WITH DUAL READING SCANNER - An imaging method for imaging a region of investigation of an object comprises the steps of generating an energy input beam with an energy beam source, irradiating the region of investigation with energy input beam components of the energy input beam along a plurality of projection directions, the energy input beam components being formed with a frame mask being arranged between the energy input beam and the object and including frame mask windows, measuring first integrated attenuation values of the energy input beam components with an outer detector device arranged outside the frame mask, measuring second integrated attenuation values of the energy input beam components with a frame mask detector device being arranged on an inner surface of the frame mask, and reconstructing an image of the region of investigation based on the first and second integrated attenuation values. Furthermore, an imaging device for imaging a region of investigation of an object is described.10-01-2009
20080260091Medical installation and method pertaining thereto - The invention relates to a medical installation comprising a device for generating x-ray images or computed tomography images or positron emission tomography images or single-photon emission computed tomography images and a device for generating endoscopic images. The device for generating x-ray images or computed tomography images or positron emission tomography images or single-photon emission computed tomography images and the device for generating endoscopic images are designed as an integrated unit.10-23-2008
20090257548COMPUTED TOMOGRAPHY SYSTEM - A computed tomography system is disclosed herein. The computed tomography system includes a detector module and a rail in contact with the detector module. The rail at least partially defines a passageway adapted to transfer a coolant10-15-2009
20120195403TOMOSYNTHESIS IMAGING - Systems and methods for providing radiographic, stereoscopic and tomographic images of an object of interest. Examples of objects of interest are body parts of living beings, such as the human breast and the human chest. The apparatus includes a high-fluence rate x-ray source and a plurality of satellite x-ray sources operating at lower fluence rate than the high-fluence rate source. A controller controls the operation and locations of the sources, and the operation of a detector. The method provides procedures in which the operation of the high-fluence source and the satellite sources are individually controlled as to location and orientation relative to the object of interest. In some operations, one satellite source may be operating while another satellite source may be repositioning. By proper control, a reduced x-ray dose and reduced operating time can be attained, thereby improving image quality, patient care, and patient experience.08-02-2012
20100166138X-RAY CT APPARATUS - An X-ray CT apparatus includes an X-ray irradiator which irradiates fan-beam X-rays; a multi-channel X-ray detector disposed to face the X-ray irradiator; a transmitted X-ray data collection device which scans a subject while rotating the X-ray irradiator and the X-ray detector to collect transmitted X-ray data of two or more views; a scan control device which controls the scan; and an image reconstruction device which reconstructs an image. The X-ray irradiator irradiates fan-beam X-rays which are deflected to one side of the center of rotation, the X-ray detector has the number of channels to cope with a spread of the fan-beam X-rays, and the scan control device allows the X-ray irradiator and the X-ray detector to conduct a scan of at least one rotation.07-01-2010
20100189211X-RAY SOUCE FOR MEASURING RADIATION - Cone-beamCT scanners with large detector arrays suffer from increased scatter radiation. This radiation may cause severe image artefacts. According to an exemplary embodiment of the present invention, an examination apparatus is provided which directly measures the scatter radiation. The measurement is performed by utilizing an X-raytube with an anode disk (07-29-2010
20110129058METHOD FOR PRODUCING A DENTAL 3D X-RAY IMAGE, AND X-RAY DEVICE THEREFOR - In a method for the creation of a dental 3D radiograph of at least a subregion, forming a volume (06-02-2011
20130216018X-RAY CT APPARATUS AND DATA TRANSMISSION METHOD OF X-RAY CT APPARATUS - According to one embodiment, an X-ray CT apparatus includes a data acquiring unit, a data processing unit and a data transmitting unit. The data acquiring unit is configured to expose an X-ray to an object, acquire detection data of the X-ray having transmitted the object and compress the detection data to generate compressed data. The data processing unit is configured to generate X-ray CT image data of the object based on the compressed data transmitted from the data acquiring unit through a transmission line. The data transmitting unit is configured to transmit uncompressed detection data of an X-ray to the data processing unit through the transmission line according to information from an input device.08-22-2013
20100142669CT SCANNING DEVICE - A CT scanning device includes a scanning gantry, a supporting means for a scanning table, and a supporting base for fixing and supporting the scanning gantry. The scanning gantry is configured to scan a subject and to collect scanning data. The supporting means supports the scanning table, and is mounted on the supporting base and located between the scanning gantry and the supporting base.06-10-2010
20100128840PHOTOGRAPHING APPARATUS OF COMPOSITION-IMAGE FOR DENTAL DIAGNOSIS - A composite imaging apparatus for dental diagnosis, wherein dental diagnosis for teeth/periodontal diseases and orthodontics can be simply done even with an imaging apparatus, and a patient's head portion can be automatically rotated according to image taking directions so as to simplify radiography, save radiography time, and minimize X-ray exposure. The apparatus includes a rotary arm horizontally rotating in left and right directions in order to take an X-ray image of teeth, jawbone and alveolar bone of a patient; a support frame vertically moving with a proper range according to a height of the patient, supporting and enabling the rotary arm to be fixed and horizontally rotate; and an object moving device formed on the base so as to move up and down a for certain range, reciprocate in forward and backward directions, horizontally rotate in forward and reverse directions while the patient is sitting thereon, and facilitate radiography.05-27-2010
20090074129CT Method for the Examination of Cyclically Moving Object - The invention relates to a computer tomography method for the detection of a cyclically moved object in an examination zone. First, after the acquisition of the measured values, a rough image of the examination zone is reconstructed from which a region relevant for the further method is selected. For the generation of an image with reduced motion artifacts or improved temporal resolution, reconstruction windows in predefinable position are used, which are optimized in such a way that they are, on the one hand, smallest possible, on the other hand, however, sufficiently large, to be able to reconstruct all voxels of this region. Only measured values acquired within the reconstruction windows are taken into account for the reconstruction of a CT image of the region.03-19-2009
20090147909X-RAY CT SYSTEM AND A METHOD FOR CREATING A SCANNING PLAN - A condition on the attribute of an image for generating multi-frame image data containing a plurality of frames of images per file from image data is stored beforehand. When image data is received, multi-frame image data is generated from the received image data based on incidental information contained in the image data and the condition stored beforehand. Then, the generated multi-frame image data is archived. When a request for an image is made by a certain terminal, an application functioning on the terminal is identified, and multi-frame image data appropriate for the application is sent from among the generated multi-frame image data.06-11-2009
20080279328Systems and Methods Using X-Ray Tube Spectra For Computed Tomography Applications - Computed tomography (CT) systems are provided that utilize x-ray tube spectra in connection with the generation and/or interpretation of CT data. The disclosed systems and methods use x-ray tube spectra associated with CT systems to enhance contrast and/or image quality, e.g., by making use of energy selective detection techniques. The x-ray spectra may be determined in a variety of ways, e.g., incorporation of a spectral x-ray tube model into the CT system, using the output of Monte-Carlo simulations, and/or processing measured experimental spectral tube data for the CT system. The x-ray tube spectra is generally generated by and/or stored in a computer system associated with the CT system and may be used in support of an energy selective detective method and/or generation of spectral CT images.11-13-2008
20090110139X-RAY COMPUTED TOMOGRAPHY APPARATUS - A control unit performs helical scanning an subject while moving a top along a direction substantially parallel to a body axis. An acquisition unit acquires projection data via an X-ray detector. A projection data extraction unit extracts a projection data set necessary for the reconstruction of image data associated with a predetermined slice position from the projection data. A weighting unit assigns a smaller weight to first projection data of the extracted projection data than a weight assigned to second projection data, the first projection data being acquired outside a predetermined period including a predetermined acquisition time of the projection data at the predetermined slice position, the second projection data being acquired within the predetermined period. A reconstruction processing unit reconstructs image data on the basis of the first projection data and the second projection data to which the weights are assigned.04-30-2009
20110129056COMPUTERIZED METHOD AND PROCESSOR FOR SELECTING ACQUISITION CONFIGURATIONS TO OBTAIN X-RAY COMPUTED TOMOGRAPHY DATA - In a method to assist in the selection of an acquisition configuration from a set of adjustable acquisition configurations for the acquisition of x-ray projections of the heart of a patient with a computed tomography apparatus to examine the heart of the patient, the which method is based on an examination type to be specified. At least two acquisition configurations for the specified examination type (which acquisition configurations can be adjusted at the computed tomography apparatus) are considered for which at least one probability density function is respectively kept ready that was determined for the respective acquisition configuration for a specific variable pertaining to a person and/or for the x-ray dose to be applied to the person. Using the at least two probability density functions, the acquisition configuration that is best suited for the examination of the heart of the patient according to the specified examination type is determined from the at least two adjustable acquisition configurations under consideration, based on at least one determined variable to be specified and pertaining to the current patient to be examined and/or based on a value pertaining to the applied x-ray dose. The invention also concerns a computed tomography apparatus operable according to such a method and a storage medium encoded with programming instructions for implementing such a method.06-02-2011
20100296623VISUALIZATION OF 3D IMAGES IN COMBINATION WITH 2D PROJECTION IMAGES - It is described an improved visualization of an object under examination (11-25-2010
20100310035MEDICAL X-RAY EXAMINATION APPARATUS FOR PERFORMING K-EDGE IMAGING - The invention relates to a medical X-ray examination apparatus (12-09-2010
20130136225COMPONENT APERTURE LOCATION USING COMPUTED TOMOGRAPHY - An exemplary component measuring method includes determining a position of an aperture of a component using a computed tomography scan of a gage and a component. The gage is inserted into the aperture of the component during the computed tomography scan.05-30-2013
20130136226X-RAY PHOTOGRAPHING DEVICE - An X-ray photographing device includes an X-ray irradiating unit (05-30-2013
20100239063ROTATING ANODE X-RAY TUBE WIBH A SADDLE SHAPED ANODE - The rotating anode x-ray tube comprises an anode, whose focal track has the shape of a saddle trajectory. A proper anode angle to enable a high power line focus is always realised along the focal path on the anode. The x-ray tube is for CT scanners and enables a movement of the focal spot along the patient axis during gantry rotation. In this way, cone beam artefacts due to the reconstruction may be avoided.09-23-2010
20090213983Multi-Modality Tomography Apparatus - The invention relates to a multi-modality tomography apparatus (08-27-2009
20100322372REFERENCE STRUCTURES AND REFERENCE STRUCTURE ENHANCED TOMOGRAPHY - A reference structure tomography device is provided which includes a reference structure configured to intercept and modulate energy in the form of waves or otherwise propagating from a source to a sensor, along longitudinal and traverse directions. The reference structure modulates or otherwise conditions the propagating wave to simplify an inversion process on the data set created by the interaction between the wave and the sensors. The reference structure can modulate a wave through multiple types of interactions with the wave including obscuring, defracting, defusing, scattering, and otherwise altering any characteristic of a portion of the wave. By selecting a reference structure that is compatible with the sensors, the number of measurements needed to resolve the source through the source wave is reduced. The reference structure can also increase the resolution of an imaging system. Thus, by reducing or altering the data collected by the sensors, the reference structure tomography device can improve the imaging abilities of the system.12-23-2010
20090067568SYSTEM AND METHOD FOR X-RAY BASED ASSESSMENT OF ANEURYSM PULSATION - A method of assessing rupture risk of an aneurysm from time-resolved images includes injecting a contrast enhancing agent into a patient with an aneurysm, using an electrocardiogram (ECG) signal to trigger an image acquisition run, wherein a sequence of 2D X-ray fluoroscopic images is acquired along with a corresponding ECG signal value, rotating a C-arm attaching the X-ray fluoroscopic imaging apparatus during said image acquisition run, wherein the images in said X-ray fluoroscopic image sequence are acquired from a rotating viewpoint, sorting the images in said X-ray fluoroscopic image sequence into time windows of the cardiac cycle based on the ECG signal, and constructing one or more 3-dimensional (3D) angiography image volumes of said aneurysm from said 2D fluoroscopic image sequence.03-12-2009
20100177862SCANNING AND RECONSTRUCTION METHOD OF A CT SYSTEM AND CT SYSTEM - A method is disclosed for scanning an examination object with a CT system and the generation of at least one computed tomographic sectional view from data obtained from the scanning and a CT system. In at least one embodiment, data used for generating the at least one sectional image is filtered out with different intensities as a function of a predetermined time range and/or projection angle range of the measurement of high local frequencies.07-15-2010
20110129057METHOD FOR DETERMING A CORRECTION FUNCTION FOR CORRECTING COMPUTED TOMOGRAPHIC NUMBERS OF A SMALL TARGET OBJECT IN A CT IMAGE - A method of correcting target region in computed tomographic (CT) image, including the steps of obtaining a CT image of a patient; determining the size of a target object in the CT image; and correcting CT numbers of a portion of the CT image that corresponds to the target object, based on the determined size of the target object.06-02-2011
20110080990SYSTEMS AND METHODS FOR OBTAINING RECONSTRUCTED IMAGES DURING A TREATMENT SESSION - A medical system includes a treatment radiation source configured to deliver treatment radiation during a treatment session, an imaging system configured to obtain image data during the treatment session, and a processor configured to determine a beam break, and automatically operate the imaging system to obtain the image data during the beam break. A medical system includes a treatment radiation source, an imaging system configured to automatically obtain image data in a beam break that occurs during a treatment session, and a processor configured to automatically operate the treatment radiation source to deliver treatment radiation during the treatment session after the beam break ends.04-07-2011
20090016483X-RAY APPARATUS, IMAGE PROCESSING DISPLAY APPARATUS AND COMPUTER PROGRAM PRODUCT - An X-ray imaging machine is configured such that a three-dimensional blood-vessel information creating unit creates information concerning a three-dimensional blood-vessel core line and a position of a plaque in a subject blood vessel based on three-dimensional volume data obtained from an image taken by an X-ray computed tomography apparatus. A plaque-depth information image creating unit creates a plaque-depth information image on which the plaque is differently displayed in accordance with whether the plaque is present in front of or in the back of the three-dimensional blood-vessel core line with respect to a projection direction, based on the created information concerning the three-dimensional blood-vessel core line and the position of the plaque. An X-ray image display unit displays the created plaque-depth information image over an X-ray image in a superimposed manner.01-15-2009
20110243296COMPUTED TOMOGRAPHY SYSTEM WITH LIQUID COOLING - A computed tomography system has a gantry with a rotor side that can be rotated around a system axis during operation, at which at least one x-ray tube is mounted. To cool the at least one x-ray tube a liquid cooling system is equipped with a fluid volume filled with cooling liquid, the fluid volume extends over distances of different sizes from the system axis. The fluid volume is located on the rotor of the gantry and thus is exposed to centrifugal force during operation. To increase pressure in the cooling system, a flexible compensation volume and a movable mass element that rotate with the gantry are provided. The mass element is arranged such that the centrifugal force acting on the mass element during operation causes pressure to be exerted on the cooling liquid.10-06-2011
20090016482ARTIFACT SUPPRESSION - A computed tomography scanner (01-15-2009
20110243297X-Ray or Infrared Imaging Device Comprising a Dose Limiter, With Controlled Translation Speed - X-ray or infrared imagery apparatus, for radiography or scanning, comprising: 10-06-2011
20100220832METHODS AND APPARATUS FOR DIFFERENTIAL PHASE-CONTRAST FAN BEAM CT, CONE-BEAM CT AND HYBRID CONE-BEAM CT - A device for imaging an object, such as for breast imaging, includes a gantry frame having mounted thereon an x-ray source, a source grating, a holder or other place for the object to be imaged, a phase grating, an analyzer grating, and an x-ray detector. The device images objects by differential-phase-contrast cone-beam computed tomography. A hybrid system includes sources and detectors for both conventional and differential-phase-contrast computed tomography.09-02-2010
20090316854Multi-modality system for screening, imaging and diagnosis in dense compressive media and method of use thereof - A multi-modality system and method for performing screening/detection, imaging and diagnosis/characterization of materials and objects in dense compressive media, such as in medical soft tissue applications, is disclosed. Medical tissue applications include but are not limited to the detection and diagnosis of breast tumors. Generally, the present invention involves coupling X-ray mammography screening devices and methods with a system and method for further, real-time diagnosis of the X-ray results comprising an ultrasound subsystem for exciting target tissues and a microwave subsystem for measuring the response, imaging and diagnosing the target tissues.12-24-2009
20110085637Reconstruction of 3D image datasets from x-ray and cone-beam data - A method for producing a 3D image dataset of an object with an imaging system having an x-ray source and an x-ray detector is provided. A series of two-dimensional arrays of cone beam data from the detector is acquired while the source moves along a substantially planar trajectory around the object. The trajectory is described by a series of source points serially numbered by a counter parameter. The cone beam data is differentiated with respect to the counter parameter at a fixed ray direction to produce a derivative of the cone beam data. The derivative is filtered with a Hilbert-like filter to produce filtered cone beam data. The acquired or the filtered cone beam data is multiplied with a redundancy weighting function. The cone beam data is back-projected to reconstruct a 3D image dataset.04-14-2011
20110085636X-Ray System and Method for the Generation of a Scan Path - A method for generation of a scan path for an x-ray source and/or an x-ray detector of an x-ray system is provided. CT-type imaging on the x-ray system is enabled by traversing the scan path upon simultaneous acquisition of a series of x-ray images. An original scan path of the x-ray source and/or of the x-ray detector is provided, where the scan path is defined by a series of original acquisition points. A viewing axis from the x-ray source to the object and/or the detector is identified for at least one acquisition point on the scan path. A modified scan path is generated by displacement of the at least one acquisition point at least partially along the viewing axis so that the scanning movement upon traversing the modified scan path can be reproduced as in the original scan path.04-14-2011
20100054393External Smoothing for Tomographic Image Reconstruction - Smoothing a first object, thereby creating a smoothed object having a smoothed value associated with each object point in object space, includes receiving the first object, determining, in a series of iteration steps, single-kernel-smoothed objects, wherein each iteration step includes based on the first object, determining a start object and smoothing the start object using a kernel function associated with the iteration step, thereby creating the single-kernel-smoothed object having single-kernel-smoothed values associated with each object point, and constructing the smoothed object from the single-kernel-smoothed values.03-04-2010
20110150172MEDICAL IMAGING SYSTEM AND METHOD - A medical imaging device capable of determining the number of projections in which at least one point located above or at the level of the object support surface is present.06-23-2011
20110150170ULTRA-SHORT PULSED X-RAY IMAGING - Technologies are generally described for employing ultra-short pulsed X-rays in X-ray computer tomography. Timing parameters of binary modulation applied to the X-rays at the source may be adjusted based on detector characteristics, industry standards, and/or user input. The timing for minimum X-ray intensity during each pulse may be selected to minimize afterglow effect. The timing for the maximum X-ray intensity may then be determined based on one or more of the minimum X-ray intensity timing, desired X-ray dosage, and/or other similar parameters.06-23-2011
20090028287Methods, apparatuses and computer readable mediums for generating images based on multi-energy computed tomography data - Methods, apparatuses and computer readable mediums for generating a volume visualization image based on multi-energy computed tomography data are provided. In one method, an image is rendered based on a multi-dimensional graphical representation of the computed tomography data. The computed tomography data includes at least two different energy image data sets and the multi-dimensional graphical representation represents intensity values of each of the at least two different energy image data sets.01-29-2009
20110069807METHOD AND APPARATUS FOR DETERMINING AN IMAGE FROM X-RAY PROJECTIONS RECORDED WHEN TRAVERSING A TRAJECTORY - A method for determining attenuation coefficients for an object using a movable x-ray source and a detector for recording projections is provided. The method includes defining a trajectory for the movable x-ray source, defining filtering lines for the filtering of projection data, and defining positions on the filtering lines, at which the projection derivative is to be formed using a mathematical algorithm for a back-projection. The method also includes defining sampling positions on the trajectory, traversing, by the x-ray source, the trajectory and recording a projection for each sampling position. Projection derivatives with respect to the trajectory path are calculated numerically for each of the positions directly on the filtering lines, and using a mathematical algorithm, attenuation coefficients are determined for the object from the calculated projection derivatives, for the reconstruction.03-24-2011
20110103543SCATTER CORRECTION BASED ON RAW DATA IN COMPUTER TOMOGRAPHY - A method is disclosed for reconstructing image data of an object under examination from measured data, with the measured data having been detected beforehand during a relative rotational movement between a radiation source of a computer tomography system and the object under examination. In at least one embodiment, a radiation scatter correction variable is determined, which is subjected to a low pass filtering. The filtered radiation scatter correction variable is connected with the measured data to correct the measured data, and image data is reconstructed from the measured data thus corrected.05-05-2011
20100322374TOMOGRAPHY APPARATUS WITH AN ANNULAR AIRFLOW CHANNEL WITH AN AIR-DIVERTING VENTILATION ELEMENT - A tomography apparatus has an annular channel and at least one ventilation element for the purpose of drawing off an air current flowing through the annular channel. The ventilation element contains an intake window that is located in the annular channel for the purpose of drawing off at least a portion of the air current. In order to obtain an even flow profile at an output window of the ventilation element, the intake window has a greater effective intake cross-section at both sides than at the middle. By such evening the flow profile at the output window, turbulence and air current interruptions of the air can be generally avoided, such that when operating the tomography apparatus, disrupting acoustic emissions may be reduced, or a higher air flow and thereby a greater cooling effect may be obtained.12-23-2010
20080253502Method and Device for the Iterative Reconstruction of Cardiac Images - The invention relates to a method and a device for the iterative reconstruction of cross-sectional images of the heart (10-16-2008
20100322375X-RAY CT SCAN SIMULATOR AND X-RAY CT SCAN APPARATUS - There are provided an X-ray CT scan simulator and an X-ray CT apparatus in which a lesion postulated by an operator can be displayed on a simulation image and a high-precision simulation containing a postulation of occurrence of a new lesion can be performed. They comprise an image storing device for storing a reference image, a target noise value setting device for setting a target noise value of a desired image, a simulated lesion setting device for setting a condition for a simulated lesion postulated by the operator, a simulation image generating device for generating a simulation image containing a simulated lesion by using the reference image on the basis of the set target noise value and the condition for the simulated lesion, and an image display device for displaying the simulation image containing the simulated lesion.12-23-2010
20100296624HIGH-FREQUENCY SADDLE-TRAJECTORY FOR AXIAL CARDIAC CT - If, in cardiac CT, the time window becomes shorter than the time required for a complete rotation of the gantry, the volume that can be reconstructed becomes small due to the non-existence of related pi-lines. According to an exemplary embodiment of the present invention, an examination apparatus is provided which generates a radiation beam oscillating in z-direction with an oscillation frequency higher than the rotational frequency of the source. This may provide for an exact image reconstruction of large volumes.11-25-2010
20100278295JITTER-FREE SPATIAL TRIGGERING OF A DETECTOR OF A CT SYSTEM - A method is disclosed for acquiring measured data by way of a computed tomography system, wherein the measured data is acquired by a detector unit disposed opposite the radiation source during a rotation of a radiation source around an examination object. In at least one embodiment, the rotation is subdivided into succeeding time segments during each of which measured data is acquired, and each of the succeeding time segments has either a first length or a second length consisting of two predefined lengths.11-04-2010
20100098209SPECTRUM-PRESERVING HEEL EFFECT COMPENSATION FILTER MADE FROM THE SAME MATERIAL AS ANODE PLATE - It is described a filter (04-22-2010
20090022261Method for evaluating a tomography data record, and a tomography workstation - A method is described for evaluating a tomography data record. In at least one embodiment, a tomography data record of a hollow organ is generated, the tomography data record is analyzed automatically, and organ sections to be assessed as critical are determined. Further, a corresponding findings list entry is generated in a findings list as a reaction to a determined organ section to be assessed as critical, various organ sections are displayed successively on the basis of the tomography data record, and after its first display, an organ section assessed as critical can be selected for renewed display directly via the findings list. Furthermore, a corresponding tomography workstation is described.01-22-2009
20120201344METHOD AND X-RAY DEVICE FOR ADAPTING GREYSCALE WINDOWING - In a method and x-ray device to adapt the width and the position of a central value of a greyscale windowing for imaging with the x-ray device based on CT values determined with said x-ray device, the adaptation takes place within the scope of a determination and adjustment of an acquisition tube voltage of an x-ray tube of the x-ray device for an examination of a defined tissue of a patient, assuming a reference tube voltage for the examination of the defined tissue of the patient, and in which a width and position of a central value of the greyscale windowing that are associated with the reference tube voltage are automatically adapted to the acquisition tube voltage.08-09-2012
20090168948Detector device and CT inspection system having the same - Disclosed is a detector device, comprising: an adjustable positioning base and a detector module. The adjustable positioning base includes: a horizontal plate being able to fixedly connect onto an annular rotation table or disk; and a vertical plate extending from the horizontal plate and generally perpendicular to the horizontal plate. A horizontal through long groove is provided at one side of the vertical plate, and the detector module is able to fixedly installed in said horizontal through long groove of the adjustable positioning base. By employing the technical solution defined in the present invention, the detector device has a compact structure, and precision adjustment and positioning for the detector device can be achieved. In addition, the present invention also provides a CT inspection system having the above detector device.07-02-2009
20110211664CONE BEAM Z-AXIS COVERAGE - An imaging system includes a radiation source (09-01-2011
20110007866X-RAY CT APPARATUS AND METHOD FOR CORRECTION OF X-RAY BEAM POSITION - An X-ray tube 01-13-2011
20110164721X-RAY IMAGE RECORDING SYSTEM AND X-RAY RECORDING METHOD FOR RECORDING IMAGE DATA WITH X-RAY UNITS FOR VOLUME RECONSTRUCTION - The present invention relates to an x-ray image recording system for recording x-ray projection images of alignment information for recorded x-ray projection images, comprising an x-ray tube and an x-ray image detector being arranged in the optical path of the x-ray tube for recording x-ray projection images of an object that can be disposed and/or that is disposed between the x-ray tube and the x-ray detector in an imaging region in a locally fixed manner, wherein the x-ray tube and the x-ray detector are disposed in a locally fixed manner relative to each other, and can be moved about the imaging region, at least in sections, a position sensor being disposed relative to the x-ray tube and the x-ray detector in a locally fixed manner, by means of said sensor the current alignment of the x-ray tube and the x-ray detector can be determined relative to a predefined reference direction at the moment of recording an x-ray projection image, and a storage unit for storing recorded x-ray projection images together with the respective current alignment of the x-ray tube and the x-ray detector. The invention comprises a computer being connected to the storage unit for the purpose of data exchange, by means of said computer the position data of the x-ray projection image that are necessary for the calculation of the layered images if the reconstruction can be calculated from the stored, associated current alignment for the purpose of layered image reconstruction based on multiple recorded x-ray projection images for each recorded x-ray projection image utilized.07-07-2011
20120148013SELF ADJUSTING BEARING USED ON CT GANTRY - A self adjusting bearing for use on a CT gantry is provided. The self adjusting bearing is configured to be mounted on a main frame of the CT gantry and is configured to support a rotating base of the CT gantry wherein the self adjusting bearing includes a roller, a first component, and a second component, the roller is configured to support the rotating base and is rotatably mounted on the first component, the second component is configured to be mounted on the main frame, and the first component and the second component are configured to rotatably engage each other such that they can rotate relative to each other during the mounting of the self adjusting bearing.06-14-2012
20110135051IMAGING APPARATUS - An imaging apparatus for irradiating an object includes a source arrangement, from which x-rays from different positions that form an at least one-dimensional structure may be emitted. The imaging apparatus also includes a detector arrangement for detecting the x-rays. An object is positioned between the source arrangement and the detector arrangement so that, with the detector arrangement, the x-rays attenuated by the object are recorded. The imaging apparatus also includes an evaluation apparatus for evaluating the signals recorded by the detector arrangement. A region of the detector arrangement is assigned to different positions of the structure, from which x-rays are directed at the region in partial irradiations. The region is aligned relative to the structure, such that the partial irradiations that are produced from the different positions of the structure with a region of the detector develop a radiation geometry that irradiates the object in a planar fashion.06-09-2011
20110075791Radiographic image capturing apparatus, radiographic image capturing method, and position calculating method - A radiographic image capturing apparatus includes a radiation source that outputs radiation, a radiation detector for detecting the radiation and converting such radiation into a radiographic image, and a reference point, which is disposed in a removable manner between the radiation source and the radiation detector. The reference point is disposed at the position of a center of rotation of the radiation source, which is set between the radiation source and the radiation detector. By rotating the radiation source about the position of the center of rotation, the radiation source applies radiation with respect to the reference point from at least two different angles.03-31-2011
20100166137PET DEVICE - A gantry has a cylindrical shape and rotates around a subject on a top panel about the body axis. An X-ray irradiating part is arranged inside the gantry and emits an X-ray. An X-ray detector is arranged at a position facing the X-ray irradiating part and detects the X-ray transmitted through the subject. PET detectors are arranged in two separate regions facing the rotation center and detect γ-rays emitted from the positron-emitting nuclides. A moving mechanism moves the top panel and the gantry relatively to each other. An X-ray CT image generator generates an X-ray CT image of the subject based on the result of detection by the X-ray detector. A PET image generator generates a PET image of the subject based on the γ-rays detected by the PET detectors on the circumference in accordance with rotation of the gantry.07-01-2010
20100195786X-ray photographing apparatus - The present invention relates to an X-ray photographing apparatus that is capable of being automatically transformed to panoramic, CT, and cephalometric photographing apparatuses having corresponding modes in accordance with the mounting or demounting of a panoramic sensor, a CT sensor, or a cephalometric sensor thereon/therefrom, thereby at once performing the photographing for the images being the corresponding modes.08-05-2010
20110051885SEGMENTING PULMONARY ARTERIES - A method of identifying at least part of a pulmonary artery tree (03-03-2011
20110051884X-RAY TUBE AND X-RAY CT APPARATUS - An X-ray tube includes: a Wehnelt electrode having a dent inside; a filament arranged in the dent of the Wehnelt electrode and configured to emit an electron beam when electricity is passed therethrough; an anode configured to emit an X-ray in response to the incident electron beam; an electrode part configured by at least one pair of electrode members, the electrode members facing each other across a path of the electron beam, a voltage being applied to each of the electrode members; a voltage controller configured to control the voltage applied to the electrode part; and a shield member arranged in contact with the Wehnelt electrode and configured to cover part of the dent by a projecting part.03-03-2011
20120207269X-RAY GENERATING DEVICE WITH ELECTRON SCATTERING ELEMENT AND X-RAY SYSTEM - The present invention relates to X-ray generating technology in general. Providing X-ray generating device internal voltage sources or potentials may help reduce necessary feed-throughs into an evacuated envelope of an X-ray generating device. Consequently, an X-ray generating device comprising an electron scattering element is presented. According to the present invention, an X-ray generating device is provided, comprising an electron emitting element 08-16-2012
20110188625MULTI-CATHODE X-RAY TUBES WITH STAGGERED FOCAL SPOTS, AND SYSTEMS AND METHODS USING SAME - A source of X-rays including at least two cathodes and at least one common anode configured and arranged so as to generate at least two spaced apart beams of X-rays emanating from respectively different locations of the anode, and separately controlled so as to be generated independently of one another. The staggered focal spots can be generated simultaneously or alternately as required. An X-ray imaging system comprising such an X-rays source, and a method utilizing such a source are also disclosed.08-04-2011
20110150171COMPUTED TOMOGRAPHY SYSTEM WITH DATA COMPRESSION AND TRANSFER - A computed tomography (CT) system that includes a rotational gantry and a stationary structure communicatively coupled to the rotational gantry is provided. The rotational gantry includes an X-ray source configured to emit an X-ray beam through a subject, an X-ray detector comprising one or more detector elements that receive incoming X-rays and to convert the incoming X-rays to image signals, and a data acquisition unit that processes the image signals to generate processed image data. The stationary structure is coupled to the rotational gantry via one or more slip rings that transfer the processed image data from the rotational gantry to stationary memory integral with the stationary structure via a bidirectional serial data exchange protocol.06-23-2011
20110188624TOMOSYNTHESIS WITH SHIFTING FOCAL SPOT AND OSCILLATING COLLIMATOR BLADES - In a tomosynthesis system a static focal spot is moved in a direction opposite to and generally synchronized with the directional movement of an x-ray source and X-ray collimator blades are moved during each exposure in synchronization with the shifting of the static focal spot. The synchronized movement of the static focal spot, x-ray tube and collimator blades helps keep the effective focal spot fixed in space relative to the breast, detector or both during the entire duration of the exposure and keeps the x-ray field on the detector and breast static. The shifting collimator blades follow an oscillating pattern over the multiple x-ray exposures of a tomosynthesis scan.08-04-2011
20100020919FOLDABLE NUCLEAR MEDICINE GANTRY - In accordance with one aspect, imaging system (01-28-2010
20100020917X-RAY SYSTEM, AND METHOD FOR GENERATING X-RAY IMAGES - An x-ray system for generating x-ray images comprises an x-ray transmitting/receiving device, and an input arrangement (01-28-2010
20110216878SPECTRAL IMAGING - A spectral processor (09-08-2011
20120307960X-RAY COMPUTED TOMOGRAPHIC IMAGING APPARATUS AND METHOD FOR SAME - Disclosed are an X-ray computed tomographic imaging apparatus and a method for same. The X-ray computed tomographic imaging apparatus of the present invention comprises: a tomograph which radiates light onto an object being imaged by tomography, and detects the light passing through the object being imaged by tomography; a magnification rate determining unit which determines the magnification rate of an image of the object being imaged by tomography using the hardware property of the tomograph and/or the size of an input voxel; and a magnification rate controller which moves the tomography in accordance with the determined magnification rate, thereby obtaining images having a high resolution.12-06-2012
20120307961IMAGE PROCESSING APPARATUS, X-RAY CT APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus has a map data generating unit, a correction processing unit and a display processing unit. The map data generating unit generates 3D map data including voxel values based on blood signal values of a myocardium area of a heart included in volume data of the heart. The correction processing unit corrects a plurality of voxel values on each a plurality of straight lines radially extending from an interior side of the heart so as to be equivalent to a voxel value at an inner wall side of the myocardium area on each of the straight lines to generate 3D corrected map data on the basis of the 3D map data. The display processing unit generates image data on the basis of the 3D corrected map data to display on a display device.12-06-2012
20110305312X-RAY SOURCE COMPRISING A FIELD EMISSION CATHODE - The present invention relates to an x-ray source, comprising a field emission cathode, an anode, connectors for allowing application of a high voltage between the cathode and the anode for enabling emission of an x-ray beam, and an evacuated chamber inside of which the anode and the cathode are arranged, the evacuated chamber having an x-ray transparent window, wherein the field emission cathode consists of a carbonized solid compound foam having a continuous cellular structure, the continuous cellular structure providing multiple emission cites for emission of electrons onto the anode when the high voltage is applied. The field emission cathode provides for the possibility to increase the efficiency of the x-ray system as it is possible to in a much higher degree control the electrons emitted by the field emission cathode in terms of switching time, current, kinetic energy and the emission direction.12-15-2011
20120039432EXPOSURE CONDITION PROCESSING METHOD OF X-RAY CT APPARATUS AND X-RAY CT APPARATUS - An exposure condition processing method for an X-ray CT apparatus according to the embodiment includes: a step in which a first X-ray emitting condition and a second X-ray emitting condition for the X-ray CT apparatus are input to a processor; a step in which the processor, based on the first X-ray emitting condition and the second X-ray emitting condition, acquires interval times for switching the first X-ray scanning with the first X-ray emitting condition, and the second X-ray scanning with the second X-ray emitting condition; a step in which the processor, based on the rotation speed of a gantry in the X-ray CT apparatus that is previously stored in a memory and the interval times, calculates the frequency of intermittent emission of an X-ray, with respect to the rotation speed of the gantry.02-16-2012
20110075792Radiography apparatus - A radiation source is moved, relative to a detection means, in a movement range that is calculated based on a desired slice angle with respect to a predetermined base point on a base plane that defines a range of obtaining a slice image of a subject. The radiation source is moved to a plurality of positions, and a plurality of radiographic images of the subject corresponding to the plurality of positions are obtained by irradiating the subject with radiation from the plurality of positions. Further, a slice image of the subject is reconstructed from the plurality of radiographic images. When the slice image is reconstructed, radiographic images to be used to reconstruct the slice image are selected based on a distance from the detection surface of the detection means to a slice plane on which the slice image is to be generated, and the desired slice angle.03-31-2011
20120177171IMAGING FACILITY AND RADIATION THERAPY DEVICE - An imaging facility having an X-ray source, an X-ray detector, and a rotation facility operable to rotate the X-ray source and the X-ray detector around a center of rotation. The imaging facility also has a first translation facility operable to move the X-ray source in a direction that has a component that is tangential to a circle of rotation around the center of rotation.07-12-2012
20120099698BRUSH WITH BRUSH ELEMENTS FOR TRANSMITTING CURRENT AT A SLIDING SURFACE - One embodiment includes a brush for transmitting current at a sliding surface between gantry parts of a medical imaging system moving relative to one another. The brush includes brush elements that are designed and/or arranged such that the brush elements contact the sliding surface spaced apart from one another. Ends of the brush elements touch the sliding surface separately from one another.04-26-2012
20120099697Selected Image Acquisition Technique to Optimize Patient Model Construction - A system and a method are disclosed that allows for generation of a model or reconstruction of a model of a subject based upon acquired image data. The image data can be acquired in a substantially mobile system that can be moved relative to a subject to allow for image acquisition from a plurality of orientations relative to the subject. The plurality of orientations can include a first and final orientation and a predetermined path along which an image data collector or detector can move to acquire an appropriate image data set to allow for the model of construction.04-26-2012
20100086098Method, Apparatus, and System of Reducing Polarization in Radiation Detectors - Method, apparatus and system for reducing or preventing polarization in semiconductor radiation detectors for medical imaging. For example, an apparatus includes a semiconductor with electrodes coupled thereto, configured to generate an electrical signal in the electrodes in response to absorption of ionizing radiation in the semiconductor, wherein the absorption of the ionizing radiation generates a space charge in the semiconductor; and an infra-red (IR) generator configured to generate IR radiation of a selectable wavelength, the selectable wavelength being chosen so as to at least partially reduce an effect of the space charge on the electrical signal.04-08-2010
20110064187X-RAY DIAGNOSTIC DEVICE - In a precessional operation where an X-ray irradiation means and a two-dimensional radiation detector are moving on a circular or elliptic orbit respectively by rotating either one of holding means, that is a C arm or a holding means at angular rate of a·sin(t) under a steady state condition and by rotating the other holding means at angular rate of b·cos(t), the operation is carried out at angular rate (f(t), g(t)) to ensure that the maximum acceleration is smaller than the steady state acceleration during a running-up period until steady is reached.03-17-2011
20110091008X-RAY CT APPARATUS - There is provided an X-ray CT apparatus that can control an irradiation X-ray dose in accordance with a displacement of an internal organ due to breathing of an examinee or the like with satisfying both of enhancement of image quality and lessening of exposed dose. In preparation processing before scan is started, an X-ray CT apparatus 04-21-2011
20110091007System and Method for Image Reconstruction by Using Multi-Sheet Surface Rebinning - The present application is directed toward the generation of three dimensional images in a tomography system having X-ray sources offset from detectors, in particular in a system where the sources are located on a plane, while detectors are located on multiple parallel planes, parallel to the plane of sources and all the planes of detectors lie on one side of the plane of sources. A controller operates to rebin detected X-rays onto a non-flat surface, perform two dimensional reconstruction on the surface, and generate the three dimensional image from reconstructed images on the plurality of surfaces.04-21-2011
20120177172X-RAY COMPUTED TOMOGRAPHY APPARATUS - According to one embodiment, a position determination unit determines a top position at a projection data acquisition start time P by a user instruction. A first angle determination unit determines a first rotational angle at the time P by a user instruction. A second angle determination unit determines a second rotational angle at a top movement start time Q and a time interval from the time Q to the time P. A control unit controls a first driving unit to rotate the X-ray tube, controls a second driving unit to make a top start moving in response to arrival of the X-ray tube at the second rotational angle, and controls a DAS to start acquiring projection data in response to arrival of the top at the top position.07-12-2012
20120008734Target Tracking for Image-Guided Radiation Treatment - Systems, methods, and related computer program products for medical imaging and image-guided radiation treatment (IGRT) are described. In one preferred embodiment, an IGRT system provides intrafraction target tracking based on a comparison of intrafraction x-ray tomosynthesis image data with initial x-ray tomosynthesis image data acquired with the patient in an initial treatment position, the initial x-ray tomosynthesis image data having an inherent registration with co-acquired image data from a setup imaging system integral with, or having known geometry relative to, the tomosynthesis imaging system. Repeated registration of intrafraction x-ray tomosynthesis image data with pre-acquired reference image data from a different frame of reference is not required during intrafraction radiation delivery. Advantages include streamlined intrafraction computation and/or reduced treatment delivery margins.01-12-2012
20120014498RADIOGRAPHIC IMAGING APPARATUS, METHOD AND PROGRAM - A radiographic imaging apparatus includes: a radiation source for applying radiation to a subject and at least one marker; a detecting unit for detecting the radiation transmitted through the subject; and an image obtaining unit for moving the radiation source relative to the detecting means, applying the radiation to the subject from a plurality of radiation source positions provided by the movement of the radiation source, and obtaining a plurality of images corresponding respectively to the radiation source positions. The apparatus further includes a radiation source position obtaining unit for obtaining positional information of each radiation source position of interest relative to a reference radiation source position among the radiation source positions based on at least one marker image contained in each of a reference image obtained with the reference radiation source position and an image of interest obtained with the radiation source position of interest.01-19-2012
20120057669X-RAY SOURCE WITH A PLURALITY OF ELECTRON EMITTERS - The invention relates to an X-ray source (03-08-2012
20120063564Method For 2D/3D Registration - A method for overlaying a 3D volume image of a CT recording system and a 2D projection image of an angio recording system of an X-ray diagnostic facility including a rotatable gantry. The method includes providing a 3D volume image of an examination object reconstructed from a data record of the CT recording system and recording a 2D projection image of the examination object using the angio recording system. The method also includes determining a projection direction of the recorded 2D projection image in relation to the 3D volume image, based on the geometric arrangement between the recording systems. The method still further includes simulating a 2D projection image from the 3D volume image for the determined projection direction and matching the recorded 2D projection image and the simulated 2D projection image. The method includes overlaying the recorded 2D projection image and the 3D volume image, based on the matching.03-15-2012
20120027161POWER MANAGEMENT OF CT SYSTEMS - One or more techniques and/or systems described herein implement, among other things, an energy storage component disposed in a stationary portion (e.g., non-rotating portion) of a CT scanning apparatus. The energy storage component receives electrical power from an external source, such as a power outlet, and stores the electrical power. The stored electrical power is provided for an operation on a rotating portion (e.g., non-stationary) of the CT scanning apparatus upon demand, and is sufficient to perform the operation alone or in combination with power from the external source.02-02-2012
20120027162APPARATUS AND METHOD TO CARRY OUT IMAGE GUIDED RADIOTHERAPY WITH KILO-VOLTAGE X-RAY BEAMS IN THE PRESENCE OF A CONTRAST AGENT - The present invention is related to an apparatus and method to carry out image-guided radiotherapy or radiosurgical treatments using Kilovoltage X-ray beams; one of the problems with the clinical application of this treatment consists in the absorbed dosage imparted unto a point within the subject to be irradiated depends on the local concentration of the contrast agent at that point, and the lack of properly quantifying the presence of the contrast agent at each point of the tumor or malformation to be irradiated results in a significant decrease in the quality of the treatment; the method and apparatus of the present invention resolve this and other problems. The Method consists of the following steps: a) determining the geometry of the patient and the concentration of the contrast agent at each point of the same, b) planning of treatment, and c) irradiating of the tumor or malformation; the apparatus includes a system to obtain three-dimensional images of the patient, a plurality of X-ray generating sources, a system to automatically position said X-ray generating sources in such a way that the radiation produced is directed towards the site to be irradiated in the patient, and a computer controlled system.02-02-2012
20100322373SYSTEM AND METHOD FOR SCANNING AND PROCESSING PRINTED MEDIA - A mobile scanner is disclosed and may include a frame. A front axle and a rear axle may be attached to the frame. The front axle may include a first tire/wheel assembly mounted thereon and a second tire/wheel assembly mounted thereon. Further, the rear axle may include a first tire/wheel assembly mounted thereon and a second tire/wheel assembly mounted thereon. Moreover, a cab may be mounted on the frame and a body may be mounted on the frame adjacent to the cab. A volumetric document scanner may be disposed within the body. The volumetric document scanner may be configured to use x-ray computed tomography in order to scan documents and create a three-dimensional data set representing the documents.12-23-2010
20120207267ARRANGEMENT FOR CONTACTLESS TRANSMISSION OF ELECTRIC SIGNALS IN A COMPUTED TOMOGRAPHY SYSTEM - An arrangement includes at least one annular conductor arranged on a rotatable gantry part. The at least one annular conductor is operable to emit electric signals. The conductor is divided into n, where nεN and n>1, rotationally symmetrically arranged annular conductor segments that have no electric connection to one another, and n transmit units. The transmit units are each arranged on different annular conductor segments and each feed different electric signals into the annular conductor segments. Angles between the transmit units and one end of corresponding annular conductor segments are of equal size.08-16-2012
20120207268SYSTEM AND METHODS FOR FUNCTIONAL ANALYSIS OF SOFT ORGAN SEGMENTS IN SPECT-CT IMAGES - An analysis system and method for measuring soft organ functions in general and the liver specifically utilizing both measurement and imaging devices such as a SPECT system and a CT system. The two images utilize a common coordinate system and segment the liver image for enhanced functional analysis.08-16-2012
20120250819DETECTOR MODULE AND RADIATION IMAGING APPARATUS - A radiation imaging apparatus is provided. The radiation imaging apparatus includes a radiation detector including a plurality of detector modules disposed therein, each detector module including a plurality of radiation detecting elements, wherein each of the detector modules includes a temperature sensor. The radiation imaging apparatus further includes an acquiring device configured to acquire temperature characteristic information of sensitivities of the radiation detecting elements from a storing device in which the temperature characteristic information is stored in advance, and a correcting device configured to correct data detected by the radiation detecting elements, based on temperature information acquired by the temperature sensor and the temperature characteristic information acquired by the acquiring device.10-04-2012
20120250818System and Method for Off-Center Imaging - A system and a method for acquiring image data of a subject with an imaging system is provided. The system can include a gantry that completely annularly encompasses at least a portion of the subject, which can be positioned along at an isocenter of the imaging system. The system can include a source and a detector positioned within and movable relative to the gantry on a rotor. The system can include a move control module that sets move data for each of the source, detector and rotor that causes the source, detector and rotor to move in a desired motion profile to acquire image data of a portion of the subject off the isocenter of the imaging system.10-04-2012
20120300895DENTAL IMAGING APPARATUS - The invention relates to a dental imaging apparatus which includes an x-ray imaging means and at least one colour camera for photographing the face of a patient positioned at the imaging station of the apparatus, which at least one colour camera is arranged to image the patient's face positioned at the patient support station from different directions, and means arranged into functional connection with said at least one colour camera for creating a virtual three-dimensional texture model of the patient's face.11-29-2012
20100246752DYNAMIC COLLIMATION IN CONE BEAM COMPUTED TOMOGRAPHY TO REDUCE PATIENT EXPOSURE - When performing a fly-by or helical CT scan of a subject, radiation dose is limited by positioning a dynamic collimator (09-30-2010
20100172463METHODS AND COMPOSITIONS FOR IMAGING ATHEROSCLEROTIC PLAQUES - The present invention relates in general to compositions, processes and apparatus for imaging, and in particular for preparation, collection and processing of images of atherosclerotic plaques, including images obtained from X-ray microscopic computed tomography.07-08-2010
20100172462ADJUSTABLE SCANNER - For dental and facial imaging, a source of x-rays (07-08-2010
20110103542BEAM HARDENING CORRECTION FOR CT PERFUSION MEASUREMENTS - A method is disclosed for reconstructing image data of an examination subject from measured data, wherein a series of measured data sets has previously been acquired during a relative rotational movement between a radiation source of a computed tomography system and the examination subject and the measured data sets relate to the same section of the examination subject at succeeding instants in time. In at least one embodiment, first image data is reconstructed in each case from the measured data sets such that a series of first image data is available. A change variable indicating a change over time within the series of first image data is determined, and a distinction is made between different components of the examination subject in the first image data with the aid of the change variable. This distinction is used for beam hardening correction in an iterative algorithm for calculating enhanced image data.05-05-2011
20130010917SYSTEM AND METHOD OF ITERATIVE IMAGE RECONSTRUCTION FOR COMPUTED TOMOGRAPHY - A non-transitory computer readable storage medium having stored thereon a computer program having instructions, which, when executed by a computer, cause the computer to acquire a set of projection data corresponding to a plurality of image voxels and to calculate coefficients of a regularizing function configured to penalize differences between pairs of the plurality of voxels that are not immediate neighbors. The instructions also cause the computer to iteratively reconstruct an image from the set of projection data based on the regularizing function.01-10-2013
20100091936X-RAY CT SYSTEM FOR X-RAY PHASE CONTRAST AND/OR X-RAY DARK FIELD IMAGING - An x-ray CT system for x-ray phase contrast and/or x-ray dark field imaging has a grating interferometer that has a first grating structure that has a number of band-shaped x-ray emission maxima and minima arranged in parallel, the maxima and minima exhibiting a first grating period, a second band-shaped grating structure that produces, as a phase grating, a partial phase offset of x-ray radiation passing therethrough and that exhibits a second grating period, a third band-shaped grating structure with a third grating period with which relative phase shifts of adjacent x-rays and/or their scatter components are detected, and a device for value-based determination of the phase between adjacent x-rays and/or for value-based determination of the spatial intensity curve per detector element perpendicular to the bands of the grating structures. The third grating structure has a grating period that is larger by a factor of 2 to 5 than the grating period of the first grating structure.04-15-2010
20100091935NON-CONTACTING ROTARY JOINT WITH CLOCK MODULATION - A non-contacting data path for rotating data transmission of digital data from a data source to a data sink includes at least one clock modulator. A data clock frequency is specifically modulated with the clock modulator to widen a spectrum of data signals and achieve improved EMC properties in measurements according to valid EMC Standards. Owing to use of a plurality of clock modulators along a course of a non-contacting rotary transmission path, signal jitter caused by individual components of the data transmission path is in each case replaced by artificially caused jitter of clock modulation. Thus, data transmission with defined jitter and defined signal quality can be achieved.04-15-2010
20100290583METAL ARTEFACT PREVENTION DURING NEEDLE GUIDANCE UNDER (XPER) CT - The present invention relates to a method and device for preventing metal artefacts computer tomography scans made during biopsy taking, when a metal needle is present in the field of view of a scan. The direction of the metal needle and the direction of the electro-magnetic field are determined in advance. For the determination of the electro-magnetic field a position of a source of the electro-magnetic field a position of a detector are considered. The user may be warned, when the determined direction of the electro-magnetic field and of the direction of the metallic needle correspond to each other.11-18-2010
20120121062METHOD AND APPARATUS FOR GENERATING COMPUTED TOMOGRAPHY IMAGES WITH OFFSET DETECTOR GEOMETRIES - In accordance with one aspect of the invention a method and apparatus for generating complete scout scans with CT imaging devices having offset detector geometries is provided. In accordance with another aspect of the invention, a method and apparatus for increasing the reconstructable field of view 100 for CT imaging devices having offset detector geometries is provided. In accordance with another aspect of the invention, a method and apparatus for image reconstruction for region of interest and full-body imaging with CT imaging devices having offset detector geometries is provided. In accordance with another aspect of the invention, a combined x-ray and SPECT imaging system is provided.05-17-2012
20100246751METHOD AND IMAGE RECONSTRUCTION DEVICE FOR RECONSTRUCTING IMAGE DATA - A method and an image reconstruction device are disclosed for reconstructing image data on the basis of input projection data obtained via an X-ray computerized tomography system. A target convolutional kernel is selected, which, when reconstructing image data from the input projection data using simple filtered back projection, would lead to target image characteristics. Image data is then reconstructed using an iterative reconstruction method of at least one embodiment. In at least one embodiment, the method includes a) reconstructing image data of a first iterative stage from the input projection data, b) generating synthetic projection data on the basis of the image data of the current iterative stage, c) forming difference projection data on the basis of the input projection data and the synthetic projection data, d) generating residue image data from the difference projection data, e) combining the residue image data with the image data of the current iterative stage to form image data of an additional iterative stage, wherein the image data of the current iterative stage is subjected to filtering before or during combination with the residue image data by using a regularization convolutional kernel which is determined on the basis of the selected target convolutional kernel, and f) repeating b) to e) until a termination condition occurs.09-30-2010
20120128116DOSE LEVEL INDICATION - Providing an operator with information concerning radiation dose associated with an imaging operation is disclosed. In certain embodiments, the dose information may be provided in conjunction with indicators related to reference dose levels to facilitate evaluation of the dose in the context of the reference levels. The dose information may be based on real-time assessment of dose or may be an expected dose based on a proposed or planned sequence of exposure events. Further the indication may be prospective, providing an indication to the operator of when certain dose thresholds may be crossed.05-24-2012
20120213326SCAN PARAMETER POLICY - A computing apparatus includes a processor (08-23-2012
20110182400METHOD AND APPARATUS TO IMPROVE CT IMAGE ACQUISITION USING A DISPLACED GEOMETRY - A method and apparatus are provided to improve CT image acquisition using a displaced acquisition geometry. A CT apparatus may be used having a source (07-28-2011
20120213325ELECTRON COLLECTING ELEMENT WITH INCREASED THERMAL LOADABILITY, X-RAY GENERATING DEVICE AND X-RAY SYSTEM - The present invention relates to X-ray generating technology in general. Providing an electron collecting element of an X-ray generating device statically may allow for the manufacture of X-ray systems with reduced moving parts and actuating parts, possibly reducing manufacturing costs and sources for failure. Consequently, an electron collecting element with increased thermal loadability is presented. According to the present invention, an electron collecting element (08-23-2012
20120213324X-RAY CT APPARATUS - An X-ray CT apparatus includes a first setting device configured to set on a scout image of a subject, a reconstruction range of a tilt image based on a desired tilt angle such that the tilt image includes a region of interest of the subject, a second setting device configured to set on the scout image a range as a scan range for a non-tilt scan, the range being placed on an inner side of a scan range necessary to reconstruct the tilt image with respect to all scan spaces in the reconstruction range, wherein the range includes the region of interest, a scan execution device configured to execute the non-tilt scan on the scan range, and a reconstruction device configured to reconstruct the tilt image including at least the region of interest with respect to the reconstruction range based on projection data acquired during the non-tilt scan.08-23-2012
20120134461X-Ray Imaging Method And Device With Three-Dimensional Processing - The invention relates to an X-ray imaging method, of the computed tomography type, in which a programmed computer is used to process data (c05-31-2012
20120257709X-RAY CT APPARATUS - There is provided an X-ray CT apparatus including: an X-ray source; a wedge which is disposed between the X-ray source and a subject and in which a shield blocking a part of an X ray is formed; a wedge driving unit for moving position of the wedge; and a system control unit controlling the wedge driving unit during a scan execution period to control the position of the wedge.10-11-2012
20120076257Radiation scanning of objects for contraband - In one example, a scanning system for examining contents of an object is disclosed comprising a frame encompassing, at least in part, a first interior region, a robotic arm movably supported by the frame, and a radiation source to generate a radiation beam to examine an object, the radiation source being pivotally coupled to the robotic arm. A detector is positioned and configured to encompass, at least in part, a second interior region within the first interior region, to detect radiation after interaction with the object. A conveying system moves the object, at least in part, through the second interior region. The frame and the robotic arm are configured to move the radiation source at least partially around the object to be examined and the robotic arm is configured to pivot the radiation source to aim the source toward the object.03-29-2012
20090022262X-RAY DIAGNOSTIC APPARATUS - An X-ray diagnostic apparatus comprises an X-ray image generating unit which generates a series of a plurality of X-ray images associated with a subject to be examined, a storage unit which stores data of a three-dimensional image associated with the subject, an image processing unit which generates data of a two-dimensional blood vessel image from the stored data of the three-dimensional image, a difference processing unit which generates a plurality of difference images by subtracting the X-ray images from each other, and a display unit which superimposes and displays each of the plurality of difference images and the two-dimensional blood vessel image.01-22-2009
20120082288ARRANGEMENT FOR THE CONTACTLESS TRANSMISSION OF ENERGY AND CONTACTLESS TRANSMISSION OF DATA IN A COMPUTED TOMOGRAPHY SYSTEM - The present embodiments relate to an arrangement for the contactless transmission of first electrical signals, second electrical signals and electrical energies between a fixed gantry part of a computed tomography system and a gantry part that may be rotated around an axis of rotation. The arrangement includes a first annular-shaped carrier ring arranged on the rotatable gantry part, at least a first conductor element arranged in or on the first annular-shaped carrier ring to receive the electrical energy, and at least a second conductor element arranged in or on the first annular-shaped carrier ring to output the first electrical signals.04-05-2012
20120230462METHODS AND APPARATUS FOR IMAGING IN CONJUNCTION WITH RADIOTHERAPY - Imaging may be performed using a megavoltage (MV) radiotherapy treatment system. An electron beam directed at a low-Z target generates an imaging cone beam. The cone beam may be shaped to conform to projections of volumes of interest in a subject. Image filling may be performed to reduce artifacts in the volumes of interest. Image data for filling may be derived from digitally reconstructed radiographs.09-13-2012
20110122990METHODS APPARATUS ASSEMBLIES AND SYSTEMS FOR IMPLEMENTING A CT SCANNER - Disclosed is a Computer Tomography (CT) system including a gantry having first and second semicircular support elements which are concentric with one another. Each of the first and second semicircular support elements has a missing sector and at least one of the missing sectors may be of an angle of 180 degrees or less. A controller may be adapted to regulate relative rotational positions between said first and second support elements.05-26-2011
20110122989DETECTION SYSTEM, DR IMAGING APPARATUS AND CT IMAGING APPARATUS - Disclosed is detection system for detection an object being conveyed along a convey path, the detection system comprises a DR imaging apparatus and a CT imaging apparatus which is provided at the downstream or upstream of the DR imaging apparatus along the convey path, wherein an average speed at which the object passes the DR imaging apparatus is higher than an average speed at which the object passes the CT imaging apparatus. The present invention also relates to a DR imaging apparatus for forming an image of an object by scanning the object, the object being conveyed along a convey path, the DR imaging apparatus comprising: an X-ray source; a detector for detecting passing of the object; a digital image processing unit; and a DR trigger module for data acquisition, wherein during the object passes the DR imaging apparatus, the DR trigger module triggers the DR imaging apparatus to perform data acquisition every time the object passes the DR imaging apparatus a predetermined distance A along the convey path.05-26-2011
20080298536TARGET POSITIONER - A target positioner including a radiation source disposed in a source housing, the radiation source adapted to emit a radiation beam, a target holder adapted to be attached to and generally immobilize a target organ, the target holder being rotatingly attached to a bearing assembly, a patient support table for supporting a patient thereon, a rotator for turning the patient support table about a rotation axis, and a source arm fixedly attached at one portion thereof to the source housing and at another portion thereof to the bearing assembly, such that when the target holder is attached to a target organ and the rotator turns the patient support table about the rotation axis, the target holder constrains the target organ from translating with respect to the radiation source and the source housing, and wherein the target holder permits the target organ to rotate by means of the bearing assembly relative to the source housing while experiencing slight translations with respect to the patient support table, so that the radiation beam emanating from the radiation source impinges upon the target organ at a plurality of angles irrespective of the misalignments between the radiation beam and the patient support table and between the patient support table and the target organ.12-04-2008
20080292047Method for determining presence distributions with local three-dimensional resolution for a substance in a vascular system and corresponding facilities - A computer receives a volume data set describing a vascular system with local three-dimensional resolution and a temporal sequence of groups of x-ray images. An acquisition time is assigned to each group of x-ray images comprising at least one x-ray image. Each x-ray image shows an actual presence distribution with local two-dimensional resolution for a substance in the vascular system, as defined at the respective acquisition time. The computer uses an initial presence distribution with local three-dimensional resolution for the substance, as defined for a start time, to determine further presence distributions with local three-dimensional resolution for the substance automatically for determination times by iterative resolution of fluid dynamics movement equations, which are per se location-independent. It automatically corrects the further presence distributions, if their respective determination time corresponds to one of the acquisition times, based on the temporally corresponding group of x-ray images.11-27-2008
20120321033INTEGRATED MICROTOMOGRAPHY AND OPTICAL IMAGING SYSTEMS - An integrated microtomography and optical imaging system includes a rotating table that supports an imaging object, an optical stage, and separate optical and microtomography imaging systems. The table rotates the imaging object about a vertical axis running therethrough to a plurality of different rotational positions during a combined microtomography and optical imaging process. The optical stage can be a trans-illumination, epi-illumination or bioluminescent stage. The optical imaging system includes a camera positioned vertically above the imaging object. The microtomography system includes an x-ray source positioned horizontally with respect to the imaging object. Optical and x-ray images are both obtained while the imaging object remains in place on the rotating table. The stage and table are included within an imaging chamber, and all components are included within a portable cabinet. Multiple imaging objects can be imaged simultaneously, and side mirrors can provide side views of the object to the overhead camera.12-20-2012
20120321035COMPUTED TOMOGRAPHY APPARATUS FOR ODONTOLOGY - The invention relates to a computed tomography apparatus designed for dental use, which includes a first arm part supporting imaging means and arranged turnable by means of an actuator, and a second arm part supporting the first arm part and arranged turnable by means of an actuator. The actuators are arranged controllable such that, during the imaging process, said first arm part does not rotate but remains in its place in relation to said second arm part and said second arm part rotates about its rotation axis.12-20-2012
20120087462HYBRID COLLIMATOR FOR X-RAYS AND METHOD OF MAKING SAME - An x-ray collimator comprises a first plurality of x-ray attenuation plates having a width and a length, the length extending along a first direction, wherein the plates of the first plurality of x-ray attenuation plates are spaced apart from one another along a second direction. The collimator comprises a second plurality of x-ray attenuation plates having a width and a length, the length extending along the second direction, wherein the plates of the second plurality of x-ray attenuation plates are spaced apart from one another along the first direction and wherein the plates of the second plurality of x-ray attenuation plates extend through the plates of the first plurality of x-ray attenuation plates. The first and second directions are orthogonal, and the width of the plates of the first plurality of x-ray attenuation plates is greater than the width of the plates of the second plurality of x-ray attenuation plates.04-12-2012
20120321034RADIOLOGICAL IMAGE RADIOGRAPHING APPARATUS AND METHOD - Deterioration of the image quality of a displayed image is prevented when displaying one image, such as a tomographic image or a stereoscopic image, based on a plurality of radiological images acquired by performing radiographing multiple times in order to display a tomographic image or a stereoscopic image. A feature amount calculation unit calculates feature amounts representing the image quality, such as density histograms, for a plurality of radiological images for generating a tomographic image acquired by tomosynthesis. A determination unit compares the feature amounts of the plurality of radiological images and based on the comparison result, and then determines whether or not an abnormal radiological image with different image quality is present in the plurality of radiological images. When an abnormal radiological image is present, a reconstruction unit generates a tomographic image by performing reconstruction after excluding the abnormal radiological image from the plurality of radiological images.12-20-2012
20120328071RADIATION IMAGING APPARATUS AND IMAGING METHOD USING RADIATION - A radiation imaging apparatus is provided. The apparatus has moving means moving a pair of an X-ray tube and a detector relatively to an object. The apparatus further has means which acquire digital frame data outputted from the detector. The frame data are acquired from the same portion being imaged of the same object at different time points. The apparatus has means which use the frame data to produce a plurality of three-dimensional optimally focused images at the respective time points, an actual position and shape of the portion being imaged being reflected in the images, and means which estimate changes of the plural three-dimensional optimally focused images.12-27-2012
20130016806ADJUSTABLE SCANNER - An apparatus for dental and facial imaging including a rotatable gantry having an axis of rotation generally in the direction of local gravitational vertical; a source of penetrating radiation mounted on the gantry; an elongated detector for detecting radiation and producing image data, the detector mounted opposite the source on the gantry, and having a length, a long axis, and a short axis The gantry, source, and detector configured to receive the head of a patient between the source and the detector, with the axis of rotation of the gantry passing through the patient's head. The detector is mounted rotatably to the gantry and movable between a first position where the long axis of the detector is generally perpendicular to the axis of rotation of the gantry and a second position where the long axis of the detector is generally parallel to the axis of rotation of the gantry.01-17-2013
20130016805METHOD AND SYSTEM FOR ACQUIRING SPARSE CHANNEL DATA AND FOR IMAGE PROCESSING UTILIZING ITERATIVE RECONSTRUCTION ALGORITHMSAANM SILVER; Michael D.AACI NORTHBROOKAAST ILAACO USAAGP SILVER; Michael D. NORTHBROOK IL USAANM SHI; DaxinAACI VERNON HILLSAAST ILAACO USAAGP SHI; Daxin VERNON HILLS IL US - The current invention is generally related to a data acquisition and or image processing method and system for acquiring and or processing sparse channel data. The sparse channel is implemented in a data acquisition system having a predetermined wider pitch between the adjacent detector cells than that in the currently available imaging systems at least in one predetermined channel direction. The sparse channel is also defined to encompass various imaging modalities including CT, positron emission tomography (PET) and positron emission tomography-computed tomography (PET/CT). The sparse channel data is acquired by the sparse channel data acquisition system, and an image is reconstructed from the sparse channel data according to a predetermined iterative reconstruction technique.01-17-2013
20110158380X-RAY COMPUTED TOMOGRAPHY APPARATUS - In one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, an X-ray detector, a rotating mechanism, a high voltage generating unit, a reconstruction processing unit, a projection image generating unit configured to generate a projection image based on output from the X-ray detector, an image display unit, and a fluoroscopy control unit configured to control the rotating mechanism, the high voltage generating unit, the X-ray detector, the projection image generating unit and the image display unit to implement stereo fluoroscopy.06-30-2011
20110158379COMPUTED TOMOGRAPHY SYSTEM HAVING NANO-SPATIAL RESOLUTION - Provide is a computed tomography (CT) system having a nano-spatial resolution. The computed tomography system can obtain a 3-dimensional image having the nano-spatial resolution of less than about 100 nm from a 2-dimension image generated by limiting a thickness of a bio sample such as cells and micro-tissues or an industrial solid sample such as a semiconductor chip to a thickness of less than about 100 μm, enlarging an X-ray transmitting the sample to a high magnification of greater than about 100× using a diffractive optic having a magnification of greater than about 100× such as a zone plate, and condensing the X-ray. When the CT system having the nano-spatial resolution is used, the 3-dimensional image having the nano-spatial resolution of less than about 100 nm may be obtained from the bio sample and industrial solid sample having a thickness of less than about 100 μm that is not observed using a conventional CT system including a cone-shaped light source unit. Therefore, an internal structure (an internal short-circuit of a semiconductor chip) of the sample may be very easily detected.06-30-2011
20080247503MEASURING BLOOD VOLUME WITH C-ARM COMPUTED TOMOGRAPHY - A system and method of obtaining perfusion data for cerebral tissue is described. The system includes a C-arm X-ray device and a computing system configured to obtain sets of rotational projection X-ray data suitable for reconstructing 3D voxel data sets. A first data set is obtained of the patient, and then contrast material is injected into the vascular system to obtain a second 1 data set. A first voxel data set is subtracted from the second voxel data set, and the resultant data set is processed so as to segment the contrast-enhanced vasculature from the remaining data. The segmented voxels are subtracted from the resultant voxel data set, so as to yield a functional data set representing the difference between the attenuation of the tissues after administering contrast agent and the tissues prior to administering the contrast agent, without the contrast enhanced vasculature. The attenuation of the functional data set represents the perfusion or cerebral blood volume (CBV).10-09-2008
20080247502System and methods for tomography image reconstruction - The present invention is a tomographic reconstruction algorithm, which is highly effective improving image quality and accuracy by reducing or eliminating artifacts within images produced by limited data tomography. Using algebraic reconstruction techniques (ART), depending on whether or not an object has higher or lower densities, a current threshold value is set to either a high or low threshold parameter and then decreased or increased, respectively, to reduce or eliminate the artifacts in a reconstructed image.10-09-2008
20090135992METHOD FOR THE PROCESSING OF RADIOGRAPHY CARDIAC IMAGES WITH A VIEW TO OBTAINING A SUBTRACTED AND REGISTERED IMAGE - In a method for processing radiography cardiac images in order to obtain a subtracted and registered fusion image, at the start of a medical intervention, a radiology image of the heart is obtained by injection of a contrast product into one of the anatomical structures of the heart. Radioscopy images are acquired and are viewed in real time. A subtraction algorithm is implemented. This subtraction algorithm uses the radiology images to make the anatomical structures of the heart visible in the radioscopy images. A registration algorithm is implemented. This algorithm is capable of registering these two images by means of a catheter placed in the coronary sinus. This registration makes it possible to obtain perfect concordance between the two subtracted images.05-28-2009
20080240338Evaluation method for mapping the myocardium of a patient - The invention relates to an evaluation method for mapping the myocardium of a patient, in particular the automated, functional evaluation, for instance the heart perfusion, in angiographic series with the steps: recording a series of angiographic recordings directly after administering a contrast agent to the patient; determining a reference area in an angiographic recording; determining a trend pattern of the contrast agent as a reference curve within the reference area from the series of angiographic recordings; obtaining trend patterns of the contrast agent from all areas of the angiographic recordings; determining the correlation between the trend patterns and the reference curve as a measure for the interrelationship between statistical variables, comparison with stored reference curve; comparison of the correlation coefficient with a threshold value; and reproduction of a marker identifying the myocardium.10-02-2008
20080240336X-Ray Ct Apparatus - An X-ray CT apparatus of the present invention includes: an X-ray source which irradiates X-rays; an X-ray detector which is arranged oppositely to the X-ray source and detects the irradiated X-rays; a scanner having a rotary disk which rotatably supports the X-ray source and X-ray detector and a power source of the rotary disk; an image processing device which makes the scanner rotate in a state where an object is inserted in between the X-ray source and the X-ray detector to irradiate the object with X-rays from directions at a plurality of angles, and makes the X-ray detector detect X-rays transmitted through the object in directions at a plurality of angles as projection data, to reconstruct a tomographic image of the object by the use of the projection data in the directions at the plurality of angles; a display device which displays the reconstructed tomographic image; a setting device which sets X-ray irradiation condition candidate by at least one combination of a tube current and a tube voltage for power to be supplied to the X-ray source by the use of a transmission thickness of a scanning subject site of the object; and a control device which supplies the with an X-ray irradiation condition corresponding to the set X-ray irradiation condition candidate, to perform scanning, and in the X-ray CT apparatus, the setting device sets X-ray irradiation condition candidate by at least one combination of a tube current and tube voltage for power to be supplied to the X-ray source by the use of an X-ray absorption coefficient of said scanning subject site of the object, and the control device makes the display device selectably display each of the set X-ray irradiation condition candidates which is provided for a diagnosis of a requested tissue of the object, to take control such that a tomographic image of the object is taken according to the selected X-ray irradiation condition candidate.10-02-2008
20080232540Display method of X-ray CT image of maxillofacial area, X-ray CT apparatus and X-ray image display apparatus - A method of displaying a standard observational X-ray CT image for diagnostics for use in an X-ray CT apparatus or an X-ray CT image display apparatus and an apparatus for displaying the same image are proposed and disclosed.09-25-2008
20080232539METHOD FOR THE RECONSTRUCTION OF A PANORAMIC IMAGE OF AN OBJECT, AND A COMPUTED TOMOGRAPHY SCANNER IMPLEMENTING SAID METHOD - In a computed tomography scanner, the panoramic image of an object to be analysed is reconstructed by: acquiring volumetric tomographic data of the object; extracting, from the volumetric tomographic data, tomographic data corresponding to at least three sections of the object identified by respective mutually parallel planes; determining, on each section extracted, a respective trajectory that a profile of the object follows in an area corresponding to said section; determining a first surface transverse to said planes such as to comprise the trajectories; and generating the panoramic image on the basis of a part of the volumetric tomographic data identified as a function of said surface.09-25-2008
20080226018CONTRAST-ENHANCED CONE BEAM X-RAY IMAGING, EVALUATION, MONITORING AND TREATMENT DELIVERY - A method of imaging a patient's uncompressed region of interest using X-ray cone beam computed tomography or cone beam digital tomography comprises the step of introducing an effective amount of a contrast agent to the uncompressed region of interest. A system for imaging a patient's uncompressed region of interest using cone beam computed tomography (CBCT) or cone beam digital tomography (CBDT) comprises an X-ray source transmitting an X-ray to the uncompressed region of interest, an image acquisition system acquiring a plurality of two-dimensional projection images data for a CBCT or CBDT data set with at least one of the projection images acquired in 35 milliseconds or less, and a processor generating a three-dimensional computed tomography image data set resolving voxels with dimensions of 0.4 mm or less in at least two orthogonal directions.09-18-2008
20080226017Data Handling and Analysis in Computed Tomography With Multiple Energy Windows - An apparatus includes a computed tomography (CT) scanner (09-18-2008
20080226016Reconstruction Algorithm for Object Point Outside the Scan-Field-of-View - CT scanners have a certain scan-field-of-view defined by the fan-angle of the system. According to an exemplary embodiment of the present invention, object points outside the scan-field-of-view may be reconstructed on the basis of a system of linear equations which may be solved iteratively and with reasonable effort. Therefore, explicit regularization techniques may be applied to recover the unknown object function.09-18-2008
20130170610X-RAY CT IMAGING DEVICE - The present invention has an object of providing an X-ray CT imaging device which can direct X-ray to an area of interest appropriately even when, for example, the height of the area of interest with respect to the X-ray detector, which is revolving, varies with respect to the revolution direction, and thus can reduce the amount of unnecessary exposure to the X-ray and can perform X-ray imaging of the area of interest with certainty. In an X-ray CT imaging device for performing X-ray CT imaging of a CT imaging area of a subject, during the X-ray CT imaging when a revolving arm is revolving, the expansion in a length direction of an X-ray cone beam, which is to be restricted by length direction blocking plates, is adapted to the shape of the CT imaging area in accordance with the revolution position of the revolving arm.07-04-2013
20130170608VOLTAGE RIPPLE REDUCTION - Among other things, one or more techniques and/or systems are described for reducing a voltage ripple in an electric signal. In this way, in radiographic imaging modalities, for example, undesired fluctuations in an output of a radiation source (e.g., undesirable fluctuations in an energy level of emitted photons) may be reduced. To reduce the voltage ripple, a (ripple reducing) electric signal is generated that comprises properties substantially similar to the voltage ripple, but opposite in phase. The (ripple reducing) electric signal is then combined with the original electric signal to generate a combined electric signal with a voltage ripple that is reduced relative to the voltage ripple of the electric signal as initially generated.07-04-2013
20130170609METHOD AND APPARATUS FOR REDUCING NOISE- RELATED IMAGING ARTIFACTS - A method for reconstructing an image of an object includes acquiring a set of measured projection data, reconstructing the measured projection data using a first algorithm to generate a first reconstructed image dataset, reconstructing the measured projection data using a second algorithm to generate a second reconstructed image dataset, the second algorithm being utilized to improve the temporal resolution of the second reconstructed image dataset, and generating a final image dataset using both the first and second image datasets.07-04-2013
20110274237DEVICE AND METHOD FOR NON-DESTRUCTIVELY TESTING CYLINDRICAL OR TUBE-SHAPED TEST OBJECTS BY MEANS OF X-RAYS - A device for the non-destructive testing of cylindrical or tubular test objects using X-radiation in tomosynthesis or laminography includes a mounting device configured to be spatially fixed at a predetermined site, a carriage attached to the mounting device and movable on a guide device in a first direction parallel to an X-axis and a C-arm disposed on the carriage. An X-ray tube and a detector are disposed opposite one another on the C-arm. The X-ray tube is movable in a second direction that is perpendicular to the X-axis, perpendicular to a plane covered by the C-arm, and parallel to a Y-axis. The detector is movable in a third direction parallel to the second direction. The C-arm may alternatively be replaced by a half shell. Also a device for the non-destructive testing of cylindrical or tubular test objects using X-radiation in a CT process includes a mounting device configured to be spatially fixed at a predetermined site, a carriage attached to the mounting device and movable on a guide device in a first direction parallel to an X-axis and a C-arm disposed on the carriage rotatable about an axis of rotation that is parallel to a Y-axis. An X-ray tube and a detector are disposed opposite one another on the C-arm and spatially fixed with respect to one another. Also a method for the non-destructive testing of cylindrical or tubular test objects.11-10-2011
20080219402Repositionable Gynecological Applicator for Image-guided Radiosurgery (IGRS) and Image-guided Radiation Therapy (IGRT) for Localized Treatment of Gynecological Tumors - A method and apparatus for precisely reproducing the position of a vaginal cylinder in relation to a patient to ensure that a planned radiation dose can be delivered with high precision to the intended treatment target volumes. In order to properly define the treatment volume, a vaginal cylinder with proper diameter is inserted into the patient's vagina. This invention addresses two potential errors: one, the incorrect vaginal cylinder position in relation to the radiation beams, and second, the inconsistent positional correlation between the vaginal cylinder and the patient's body. These two geometric errors will cause dosimetric errors. The present invention provides a method and apparatus for minimizing the geometric error and dosimetric error associated with conventional external beam radiation therapy or radiosurgery used in treating gynecological tumors. First a treatment plan is carried out to determine the treatment target volume. Second, treatment delivery is carried out by using an image-guided system to locate the position of the vaginal cylinder and comparing it relative to the treatment delivery system coordinate system and the patient's coordinate system. The displacement in the position of the vaginal cylinder from the treatment plan is corrected by calculating the transformation matrix and entering the resulting value into a position adjusting assembly. The position adjusting assembly adjusts the vaginal cylinder to exactly reproduce its location relative to the patient's coordinate system. This ensures that the image-guided system locates the precise radiation delivery position and that the radiation dose is delivered precisely to the treatment target volume.09-11-2008
20130177130X-RAY IMAGING APPARATUS AND X-RAY FOCUS POSITION CONTROL METHOD OF X-RAY IMAGING APPARATUS - An X-ray imaging apparatus including: X-ray generation means that irradiates X-rays from the focus and that has a first portion changing so as to have a first change component and a second portion changing so as to have a second change component, which is different from the first change component; focus position detection means that detects a focus position when the X-rays are irradiated; focus position change amount estimation means that estimates the amount of change in the focus position at an arbitrary point of time with respect to the reference position of the focus using a first amount of change, which changes so as to have the first change component, and a second amount of change, which changes so as to have the second change component; and correction means that corrects the positions of the irradiation region of the X-rays so as to cancel the amount of change in the focus position estimated by the focus position change amount estimation means.07-11-2013
20130114785METHOD FOR THE MEDICAL IMAGING OF A BODY PART, IN PARTICULAR THE HAND - A method is disclosed for the medical imaging of a body part, in particular the hand, wherein, in a tomographic image data record of the body part, points are marked which fix a face of interest running through the body part and which is singly or multiply curved. This curved face, which runs through all marked points, is then determined and the image content of the curved face is determined from the voxels of the image data record. This image content is mapped onto an observation plane which is finally displayed with the mapped image content on a screen. The method enables by way of example image representation of the structures of the left hand relevant to a skeleton examination by way of tomographic imaging.05-09-2013
20130208850DETERMINING A MATERIAL PROPERTY BASED ON SCATTERED RADIATION - Radiation is directed at an object, and radiation scattered by the object is sensed. An angular distribution of scatter in the sensed scattered radiation relative to a path of the radiation directed at the object is determined, and the angular distribution is evaluated. One or more atomic numbers, or effective atomic numbers, of materials composing the object is determined based on evaluating the angular distribution.08-15-2013
20130114784Dose Reconstruction During Radiation Therapy - A method for the reconstruction of a dose administered in an object to be irradiated includes providing a radiation therapy device. The radiation therapy device includes a therapeutic radiation source for emitting a therapeutic treatment beam, a portal detector opposing the therapeutic radiation source for recording measurement data of the treatment beam once the therapeutic radiation source has left the object to be irradiated, and a single or multi slice computed tomography scanner having a kV x-ray source and an opposing kV detector for producing a computed tomography of the object positioned in the radiation therapy device. The method also includes recording a computed tomography image of the object to be irradiated with the computed tomography scanner, and using the computed tomography image in order to reconstruct a dose administered to the object from measurement data of the portal detector.05-09-2013
20130177129X-RAY COMPUTED TOMOGRAPHY APPARATUS - According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube to generate X-rays, X-ray detector to detect the X-rays transmitted through an object, top to place the object, rotation driving unit to rotate a rotating frame with the X-ray tube and the X-ray detector around the object, movement driving unit to relatively reciprocate the rotating frame and the top over a plurality of times along a long-axis direction of the top, and scan control unit to control the movement driving unit in the relative reciprocal movement such that moving loci of the X-ray tube corresponding to the respective forward movements are matched with each other and moving loci of the X-ray tube corresponding to the respective backward movements are matched with each other.07-11-2013
20130177131COLLIMATOR AND CT EQUIPMENT COMPRISING THE SAME - An X-ray collimator has a collimation plate, and a shielding box made of a tungsten plastic composite, the shielding box having an opening on the top and the bottom thereof respectively, and a support part for supporting the shielding box. The collimation plate is disposed on the shielding box or the support part. Compared to the use of the shielding box alone, the collimator reduces the volume of the collimator without reducing its shielding performance.07-11-2013
20130177132X-RAY CT APPARATUS AND IMAGE RECONSTRUCTION METHOD - In order to provide an X-ray CT apparatus and the like that reconstruct an image using an iterative approximation method which ensures stable convergence and can be executed at high speed, a computation device 07-11-2013
20130156149X-RAY CT APPARATUS - An X-ray CT apparatus of the present invention includes an image reconstruction uJnit that, according to scanning conditions, acquires an irradiated X-ray image which is the distribution of the irradiation intensity of X-rays irradiated to an object by an X-ray irradiation unit, performs projection conversion of the irradiated X-ray image and a reconstructed image, and generates an exposure dose image, which is an image showing the distribution of an exposure dose of the object, and also calculates the exposure dose using the projection-converted reconstructed image and an irradiated X-ray image corresponding to a generation region of the reconstructed image.06-20-2013
20110280364Medical examination device for CT imaging and for nuclear medical imaging - A medical examination device for CT imaging and for nuclear medical imaging is provided. The medical examination device has an essentially ring-shaped gantry with a CT imaging arrangement and a nuclear medical imaging arrangement. The gantry has an especially laterally arranged, fold-out or removable segment for creating an access opening to the interior of the gantry.11-17-2011
20130188768VIBRATION CONTROL APPARATUSES, VIBRATION CONTROL METHODS, AND COMPUTED TOMOGRAPHY SCANNERS - A vibration control apparatus may include a fluid bearing provided around a rotating body to form a fluid bearing gap between the fluid bearing and the rotating body; and/or a pressure regulator configured to variably control a pressure of the fluid bearing, based on imbalance information of the rotating body, to compensate for imbalance of the rotating body. A computed tomography scanner may include a gantry configured to generate a computed tomography image while rotating around a test subject; a fluid bearing provided around the gantry to form a fluid bearing gap between the fluid bearing and the gantry; and/or a pressure regulator configured to variably control a pressure of the fluid bearing, based on imbalance information of the gantry, to compensate for imbalance of the gantry.07-25-2013
20130188769METHOD AND APPARATUS FOR INSPECTING HONEYCOMB STRUCTURE - Obtaining computer-tomography images of a first section at a distance Z07-25-2013
20110317805SYSTEM AND METHOD FOR TOMOGRAPHIC RECONSTRUCTION UTILIZING CIRCULAR TRAJECTORY AND SCANOGRAM TO REDUCE ARTIFACTS - A computed tomography apparatus and method using line data estimated from circle data and scanogram data. An image of a subject is reconstructed using the circle data and the estimated line data. The circle data and scanogram data may be weighted in estimating the line data. The apparatus and method are useful in diminishing or eliminating streak artifacts in reconstructed images such as images including the spine.12-29-2011
20120002780METHOD AND APPARATUS FOR BREATHING ADAPTED IMAGING - A method is provided for imaging a portion of a patient that moves as a patient breathes. A motion map is produced of the portion's motion during a breathing cycle of the patient. A scanning protocol is generated using information obtained from the motion map for a given source/detector position and a given point in the breathing cycle. The scanning protocol comprises at least one setting for at least one imaging apparatus component such that a desired amount of x-ray dosage is applied to the portion of the patient at the given source/detector position and the given point in the breathing cycle. An imaging scan is performed of the portion of the patient. The at least one imaging apparatus component is adjusted during the imaging scan.01-05-2012
20120020451X-RAY CT APPARATUS - An X-ray CT apparatus includes a first setting device configured to set on a scout image of a subject, a reconstruction range of a tilt image based on a desired tilt angle such that the tilt image includes a region of interest of the subject, a second setting device configured to set on the scout image a range as a scan range for a non-tilt scan, the range being placed on an inner side of a scan range necessary to reconstruct the tilt image with respect to all scan spaces in the reconstruction range, wherein the range includes the region of interest, a scan execution device configured to execute the non-tilt scan on the scan range, and a reconstruction device configured to reconstruct the tilt image including at least the region of interest with respect to the reconstruction range based on projection data acquired during the non-tilt scan.01-26-2012
20120020450TOMOSYNTHESIS SYSTEM FOR DIGITAL X-RAY IMAGING AND METHOD OF CONTROLLING THE SAME - Disclosed herein are a tomosynthesis system for digital X-ray imaging and a method of controlling the tomosynthesis system. The tomosynthesis system includes an X-ray source, a detector, and a terminal. The X-ray source continuously moves during a scan period, and maintains a uniform X-ray focus in each capture section in which capture is performed by adjusting the direction of an emitted electron beam. The detector detects an image of X-rays having passed through an area of interest of an object in the capture section. The terminal controls the adjustment of the direction of the electron beam, creates a three-dimensional (3D) X-ray image by synthesizing detected X-ray images, and then displays the 3D X-ray image.01-26-2012
20120020449Intensity modulated arc therapy with continuous couch rotation/shift and simultaneous cone beam imaging - A system for radiotherapy that includes a couch upon which a patient being treated by the system is positioned, the couch having continuous arc rotation for delivery accelerated irradiation to the patient.01-26-2012
20120020448SYSTEM AND METHOD FOR RECONSTRUCTION OF X-RAY IMAGES - Systems and method for reconstruction of x-ray images are provided. One method includes acquiring a plurality of image views using an x-ray imaging system, the plurality of image views defining a limited tomographic dataset. The method also includes performing three-dimensional (3D) image reconstruction using the plurality of image views in an iterative reconstruction, wherein the iterative reconstruction includes forming a linear combination based on a plurality of previous iteration results. The method further includes displaying an image based on the image reconstruction, wherein the image includes clinically relevant high-frequency detail information.01-26-2012
20130195239X-RAY COMPUTED TOMOGRAPHY DEVICE CALIBRATION AND VERIFICATION APPARATUS - An apparatus for calibrating an x-ray computed tomography device has a plurality of objects formed from a material that is visible to x-rays, and a base at least in part fixedly supporting the plurality of objects so that each of the plurality of objects contacts at least one of the other objects. Each one of the plurality of objects: 1) is configured to receive x-rays without changing shape, 2) has substantially the same shape and size as the other objects, 3) has an attenuation value to x-rays (“object attenuation value”), and 4) is symmetrically shaped relative to its center point. Like the objects, the base also has an attenuation value to x-rays (the “base attenuation value”). The object attenuation value is greater than the base attenuation. Each of the plurality of objects is kinematically locked in place on the base.08-01-2013
20120093278MEDICAL IMAGE PROCESSING APPARATUS AND X-RAY COMPUTED TOMOGRAPHY APPARATUS - According to one embodiment, it is an subject to reduce the occasion that a region of interest falls outside an image due to the influence of respiratory motion or pulsation. A medical image processing apparatus causes an slice image generation unit to generate a series of slice images from a series of volume data files associated with a three-dimensional region of an subject, and causes a slice position determination unit to determine each of a plurality of slices respectively corresponding to the slice images based on the position of a specific region included in the plurality of volume data files.04-19-2012
20130208849DENTAL X-RAY APPARATUS AND ASSOCIATED METHOD - A dental X-ray apparatus of the conical-beam digitized-tomography type includes: an X-ray generator emitting an X-ray beam towards an object and provided with a collimation element for collimating the emitted beam; an X-ray sensor having an active surface arranged opposite the generator; wherein the generator and the sensor can rotate simultaneously about a rotation axis, the sensor being oriented so that a longitudinal axis extending from the generator to the sensor through the rotation axis is perpendicular to the active surface of the sensor, the center of the sensor being transversally offset relative to the projection of the axis on the sensor's active surface, the arrangement of the collimation element and the sensor thus offset defining that the collimated beam illuminates the sensor's active surface while leaving a peripheral area of the surface that is faintly illuminated by the collimated beam relative to the rest of the active surface.08-15-2013

Patent applications in class Computerized tomography

Patent applications in all subclasses Computerized tomography