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Beam detection system

Subclass of:

378 - X-ray or gamma ray systems or devices

378001000 - SPECIFIC APPLICATION

378004000 - Computerized tomography

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DocumentTitleDate
20110002440METHODS, SYSTEMS, AND APPARATUSES FOR INCREASING EFFICIENCY IN COMPUTED TOMOGRAPHY DETECTION - Methods, computer-readable mediums, and systems are provided. In one embodiment, a method detects at least one faulty X-ray detector signal and adjusts a conveyor speed and/or a gantry speed in accordance with the detection to increase information for image reconstruction. In another embodiment, a method detects a high volume time. Upon detection of the high volume time conveyor speed and gantry speed is increased during the high volume time. After expiration of the high volume time, the conveyor speed and gantry speed is reduced. In yet other embodiments, the computer-readable mediums and systems are also provided which perform similar features recited by the above methods.01-06-2011
20110200167RADIATION MODULATION IN A SECURITY EXAMINATION APPARATUS - Radiation flux can be adjusted “on the fly” as an object (08-18-2011
20130044856INTERVENTIONAL IMAGING AND DATA PROCESSING - An imaging system includes a radiation source that emits radiation that traverses an examination region. A controller activates the radiation source to emit radiation and deactivates the radiation source to stop radiation emission. The controller selectively activates the radiation source to emit radiation at one or more pre-determined angles. In another embodiment, the imaging system includes a data processing component that generates a virtual three dimensional image of an object of interest of the scanned subject based on the image data. In another embodiment, the imaging system is in a communication with a data manipulation and packaging component that generates at least a two dimensional or a three dimensional data set based on the volumetric image data and packages the data set in an object provided to a remote system that manipulates and navigates through the data set.02-21-2013
20090052616Unit for X-Ray CT Imaging and X-Ray Imaging Apparatus - A unit for X-ray CT imaging to be set in a panorama X-ray imaging apparatus having a cassette holder has a digital sensor cassette for CT imaging to be set in the cassette holder, includes a two-dimensional X-ray detector for acquiring X-ray projection data for CT imaging of an object, and a controller for controlling a timing of X-ray CT imaging, a radiation field of X-ray beam generated by the X-ray detector, and the rotary device. Alternatively, the unit has the digital sensor cassette for X-ray CT imaging, an image reconstructor which calculates to convert the X-ray projection data obtained with the two-dimensional X-ray detector to a distribution of X-ray absorption coefficients of the object and creates tomographic image data of sections of the object, and an image processor which sends and receives signals for X-ray CT imaging between the X-ray detector and the image reconstructor when the digital sensor cassette for CT imaging is set in the cassette holder.02-26-2009
20100080341X-RAY CT SYSTEM TO GENERATE TOMOGRAPHIC PHASE CONTRAST OR DARK FIELD EXPOSURES - An x-ray CT system that generates tomographic phase contrast or dark field exposures, has at least one grating interferometer with three grating structures arranged in series in the radiation direction, with a modular design of the second and third grating structures. The distance between the first grating structure of the x-ray source and the second grating structure (fashioned as a phase grating) of the respective grating/detector modules is adapted, depending on the fan angle, corresponding to a period of the grating structure of the x-ray source projected onto the grating detector module at a respective fan angle (φ04-01-2010
20130083889TIME-RESOLVED TOMOSYNTHESIS IMAGING - A method for time-resolved tomosynthesis imaging for a moving object includes moving an imaging device having an x-ray source and an x-ray detector around the moving object and recording raw image data for a temporal series of tomosynthesis images. The method also includes reconstructing the temporal series of tomosynthesis images from the raw image data. While the imaging device is being moved, a motion speed of the imaging device is matched to a speed, at which the moving object is moving.04-04-2013
20130136227RADIATION TOMOGRAPHY APPARATUS, DOSE CALCULATION METHOD, AND PROGRAM - A radiation tomography apparatus is provided. The radiation tomography apparatus is configured to display a dose near a surface of a subject.05-30-2013
20100074397Method for detecting X-ray radiation and X-ray system - A method is disclosed for detecting X-ray radiation from an X-ray emitter. In at least one embodiment of the method, an electric pulse with a pulse amplitude characteristic of the energy of a quantum is generated when a quantum of the X-ray radiation impinges on a sensor, wherein a number of threshold energies are predetermined. When the pulse amplitude corresponding to the respective energy is exceeded, a signal is emitted each time the pulse amplitude corresponding to a respective threshold energy is exceeded. At least one embodiment of the method permits reliable and high-quality imaging, even in image regions with high X-ray quanta rates. To this end, at least one of the threshold energies is predetermined such that it is higher than the maximum energy of the X-ray spectrum emitted by the X-ray emitter.03-25-2010
20100074396MEDICAL IMAGING WITH BLACK SILICON PHOTODETECTOR - Medical imaging may be accomplished with a high photoconductive gain at a relatively low operating voltage by employing a black silicon photodetector and integrating CMOS components with elements of the photodetector.03-25-2010
20130039458LOW RESOLUTION SCINTILLATING ARRAY FOR CT IMAGING AND METHOD OF IMPLEMENTING SAME - A CT system includes a rotatable gantry having an opening to receive an object to be scanned, an x-ray source configured to project an x-ray beam toward the object, and a detector array configured to detect x-rays passing through the object. The detector array includes a first array of pixels positioned to receive x-rays that pass to the detector array outside a first field-of-view (FOV) to a second FOV, the first array of pixels providing a first resolution, and a second array of pixels positioned to receive x-rays passing through the first FOV, the second array of pixels providing a second resolution that is different from the first resolution. The system includes a data acquisition system (DAS) configured to receive outputs from the detector array, and a computer programmed to acquire projections of imaging data of the object, and generate an image of the object using the imaging data.02-14-2013
20130083888APPARATUS FOR DETECTING VOLUME OF FOREIGN SUBSTANCE EXISTED IN CORE OF GEOLOGICAL SAMPLE USING COMPUTER TOMOGRAPHY APPARATUS AND METHOD THEREOF - An apparatus for detecting a volume of a foreign substance existed in a core of a geological sample using a computer tomography apparatus and a method thereof, more particularly an apparatus for detecting a volume of a foreign substance existed in a core of a geological sample using a computer tomography apparatus and a method thereof capable of calculating a volume of any one object among the foreign substance existed in the core.04-04-2013
20100104062SYSTEM AND METHOD OF FAST KVP SWITCHING FOR DUAL ENERGY CT - A CT system includes a rotatable gantry having an opening for receiving an object to be scanned and an x-ray source coupled to the gantry and configured to project x-rays through the opening. The x-ray source includes a target, a first cathode configured to emit a first beam of electrons toward the target, a first gridding electrode coupled to the first cathode, a second cathode configured to emit a second beam of electrons toward the target, and a second gridding electrode coupled to the second cathode. The system includes a generator configured to energize the first cathode to a first kVp and to energize the second cathode to a second kVp, and a detector attached to the gantry and positioned to receive x-rays that pass through the opening. The system also includes a controller configured to apply a gridding voltage to the first gridding electrode to block emission of the first beam of electrons toward the target, apply the gridding voltage to the second gridding electrode to block emission of the second beam of electrons toward the target, and acquire dual energy imaging data from the detector.04-29-2010
20090154640FOCUS DETECTOR ARRANGEMENT AND METHOD FOR GENERATING CONTRAST X-RAY IMAGES - In a focus detector arrangement and method for an x-ray apparatus for generating projection or tomographic phase-contrast images of an examination subject, a beam of coherent x-rays is generated by an anode that has areas of different radiation emission characteristics arranged in bands thereon, that proceed parallel to grid lines of a phase grid that is used to generate the phase-contrast images.06-18-2009
20120183119MULTI-SLICE CT DETECTOR WITH TILEABLE PACKAGING STRUCTURE - A CT system is disclosed that includes detector modules positioned on a rotatable gantry configured to receive x-rays attenuated by an object. Each detector module includes a module frame, a plurality of tileable sub-modules on the module frame aligned along a Z-axis thereof to receive the x-rays attenuated by the object and convert the x-rays to digital signals, and an electronics board connected to the plurality of sub-modules to receive the digital signals. Each sub-module further includes an array of detector elements to receive x-rays attenuated through the object and convert the x-rays into analog electrical signals, an ASIC electronics package coupled to the array of detector elements to receive the analog electrical signals and convert the analog electrical signals to digital signals, and a flex circuit connected to the ASIC electronics package to receive the digital signals and transfer the digital signals to the electronics board.07-19-2012
20130083887DETECTOR MODULES AND METHODS OF MANUFACTURING - Detector modules and methods of manufacturing are provided. One detector module includes a detector having a silicon wafer structure formed from a first layer having a first resistivity and a second layer having a second resistivity, wherein the first resistivity is greater than the second resistivity. The detector further includes a photosensor device provided with the first layer on a first side of the silicon wafer and one or more readout electronics provided with the second layer on a second side of the silicon wafer, with the first side being a different side than the second side.04-04-2013
20080298541Smart Radiation Detector Module - An ionizing radiation detector module (12-04-2008
20130051519METHODS AND APPARATUS FOR SUPER RESOLUTION SCANNING FOR CBCT SYSTEM AND 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 one embodiment, through the application of a resolution increasing interpolator, a prescribed CBCT routine scanning mode with preset binning can increase a spatial resolution, Nyquist frequency or MTF.02-28-2013
20080285709Imaging method for variable pitch spiral CT and a CT machine for carrying out the method - An imaging method is disclosed for variable pitch spiral CT. In at least one embodiment, the method includes spiral scanning of an examination object lying on a patient table, with the aid of a beam emanating from at least one focus, and the aid of a detector arrangement of planar design lying opposite the focus, the detector arrangement supplying output data that represent the attenuation of the beams during passage through the examination object; filtering the output data; weighted back projection of the filtered output data; and visualizing a layer or a volume on a display unit on the basis of the back projected output data. In at least one embodiment, a non constant pitch of the spiral scanning is taken into account computationally during the back projection. In at least one embodiment, a CT machine is disclosed for carrying out the above named method.11-20-2008
20090304145COMPUTER TOMOGRAPHY APPARATUS - A computer tomography apparatus (12-10-2009
20090304144Computed tomography device - A computer tomography device is provided. The computer tomography device includes a rotating part and a stationary part. The rotating part has an X-ray tube for radiographing an object to be examined with X-rays and a detector for detecting the X-rays transmitted through the object. A stationary part has a data processing device for evaluating the detected measuring results, and a transmitter for supplying the X-ray tube and/or the detector and other rotating consumers with supply voltage by contactless transmission of electric power between the stationary and the rotating part. The transmitter is designed for contactless data transmission between the stationary part and the rotating part in addition to the contactless transmission of electrical power.12-10-2009
20090092225Method for the three-dimensional representation of a moving structure by a tomographic method - The invention relates to a method for a three-dimensional representation of a moving structure by a tomographic method, in which during one recording pass a series of projection recordings is registered by an imaging unit at different recording angles between a start position and an end position, it being possible to reconstruct three-dimensional image data from the projection recordings with the following steps: a) generation of tomosynthesis projection recordings along a tomosynthesis scanning path; b) interpolation of the data of the tomosynthesis projection recordings in accordance with an interpolation algorithm in order to generate a projection data set; c) use of a tomosynthesis reconstruction method on the projection data set in order to generate a tomosynthesis volume image; d) repetition of steps b) and c) for all times of interest, and e) display of tomosynthesis representations from the tomosynthesis volume images.04-09-2009
20130058452CT DETECTOR INCLUDING MULTI-LAYER FLUORESCENT TAPE SCINTILLATOR WITH SWITCHABLE SPECTRAL SENSITIVITY - A scintillator element (03-07-2013
20110013743PHASE GRATING USED FOR X-RAY PHASE IMAGING, IMAGING APPARATUS FOR X-RAY PHASE CONTRAST IMAGE USING PHASE GRATING, AND X-RAY COMPUTED TOMOGRAPHY SYSTEM - A phase grating used for X-ray phase imaging is provided, in which a pitch can be narrowed by using a diffraction grating with a low aspect ratio. A phase grating used for X-ray phase imaging, characterized in that the phase grating includes a first diffraction grating in which a first projection part whose thickness is formed so that an in-coming X-ray transmits with a phase π-shifted, and a first aperture part with the same aperture width as a width of the first projection part are cyclically arranged, and a second diffraction grating in which a second projection part with the same width as a width of the first projection part, and a second aperture part with the same aperture width as the aperture width of the first aperture part are cyclically arranged, and the second diffraction grating is formed as displaced on the first diffraction grating.01-20-2011
20100119035Computed tomography scanner, in particular for performing a spiral scan, and a method for controlling a computed tomography scanner - A computed tomography scanner is disclosed for performing a spiral scan. In at least one embodiment, the computed tomography scanner includes a rotatable X-ray emitter for generating a beam fan and an X-ray detector, positioned diametrically opposite to the emitter, and an associated evaluation unit. In at least one embodiment, provision is made for an X-ray filter arranged downstream of the X-ray emitter, the position of the X-ray filter being correlated to that of the X-ray detector. Further, the X-ray filter is partly inserted into the beam fan only during operation for generating an unfiltered and, simultaneously, a filtered radiation component of the beam fan, wherein the radiation components have different X-ray spectra and wherein the evaluation unit is designed for separate evaluation of a measurement signal of the unfiltered radiation component and a measurement signal of the filtered radiation component, to obtain dual-energy images.05-13-2010
20090268863RECONSTRUCTION METHOD FOR HELICAL CONE-BEAM CT - The invention relates to a method and a system for the reconstruction of an object function (f(x)) based on projections acquired during the motion of a radiation source on a helical trajectory (10-29-2009
20090060125X-RAY CT APPARATUS - An X-ray CT apparatus sets at least an imaging-subject area to be imaged, and a heart imaging area included in the imaging-subject area and determined based on a position and size of a heart on a subject P. When an image is taken, the X-ray CT apparatus sets imaging conditions, such as whether electrocardiographic synchronization is required for imaging and a type of reconstruction mode, based on each set imaging area.03-05-2009
20130188771METHOD FOR RECORDING AND DISPLAYING AT LEAST TWO 3D SUBTRACTION IMAGE DATA RECORDS AND C-ARM X-RAY APPARATUS - A method for recording at least two 3D subtraction image data records with a C-arm x-ray apparatus is provided. A mask run is implemented with a rotation angle of at least 180° plus fan angle plus an additional angle, while projection image data record of a native 3D image data record are recorded. A filler run is implemented after administration of a contrast agent with a rotation angle of at least 180° plus fan angle plus an additional angle. Partial 3D image data records are generated and formed into a set of projection image data records. Each set of projection image data records is reconstructed, wherein a 3D subtraction image data record is generated by subtracting data of a native 3D image data record from data of a 3D image data record after the administration of the contrast agent.07-25-2013
20130101081DETECTOR AND DAS, AND X-RAY COMPUTED TOMOGRAPHY APPARATUS - According to one embodiment, detector and DAS includes an X-ray detector, a board, a DAS, and a plurality of X-ray shielding plates. The X-ray detector detects X-rays and generates an electrical signal corresponding to the detected X-rays. The board is coupled to the X-ray detector and includes a wiring pattern to extract the electrical signal from the X-ray detector. The DAS is coupled to the board and included an electronic part to perform signal processing for the electrical signal. The X-ray shielding plates are provided for the board to prevent the electronic part from being exposed to X-rays transmitted through the X-ray detector. A portion of the wiring pattern is placed between the X-ray shielding plates.04-25-2013
20090238331X-ray Imaging System for Performing Automated Multi-step Imaging of Patient Anatomy - An X-ray imaging system performs automated multi-step imaging of patient anatomy and includes an X-ray imaging device. The X-ray imaging device supports automated movement of an X-ray detector and X-ray emitter combination relative to patient anatomy in a series of pre-programmed steps. A multi-step programming interface enables a user to select, (a) a start position for X-ray imaging at a first location of a portion of patient anatomy and (b) an end position for X-ray imaging at a second location of a portion of patient anatomy. A computation processor automatically determines a series of pre-programmed steps comprising multiple incremental distances to be moved by the X-ray detector and X-ray emitter combination relative to the portion of patient anatomy in response to predetermined data including, (i) the selected start and end positions, (ii) the length of the portion of patient anatomy imaged in an individual step and (iii) the amount of overlap desired between successive X-ray images. An imaging controller initiates automated multi-step imaging of the portion of patient anatomy by the X-ray imaging device in response to data representing the determined series of pre-programmed steps and user command.09-24-2009
20090238330PULSED X-RAY FOR CONTINUOUS DETECTOR CORRECTION - A radiographic imaging apparatus (09-24-2009
20090010382X-Ray Monitoring - Apparatus for monitoring in real time the movement of a plurality of substances in a mixture, such as oil water and air flowing through a pipe comprises an X-ray scanner arranged to make a plurality of scans of the mixture over a monitoring period to produce a plurality of scan data sets, and control means arranged to analyze the data sets to identify volumes of each of the substances and to measure their movement. By identifying volumes of each of the substances in each of a number of layers and for each of a number of scans, real time analysis and imaging of the substance can be achieved.01-08-2009
20120114094 MULTI-MODE CONE BEAM CT RADIOTHERAPY SIMULATOR AND TREATMENT MACHINE WITH A FLAT PANEL IMAGER - A multi-mode cone beam computed tomography radiotherapy simulator and treatment machine is disclosed. The radiotherapy simulator and treatment machine both include a rotatable gantry on which is positioned a cone-beam radiation source and a flat panel imager. The flat panel imager captures x-ray image data to generate cone-beam CT volumetric images used to generate a therapy patient position setup and a treatment plan.05-10-2012
20100086100APPARATUS, IMAGING DEVICE AND METHOD FOR DETECTING X-RAY RADIATION - The invention is directed at an apparatus (04-08-2010
20110019795SOLID-STATE IMAGER AND X-RAY CT APPARATUS INCLUDING SAME - A solid-state imager has a structure for capturing a high-resolution image even if any of the read wiring and the column-selection wiring is disconnected. The solid-state imager (01-27-2011
20080304620System for quantitative radiographic imaging - A system for spectroscopic imaging of bodily tissue in which a scintillation screen and a charged coupled device (CCD) are used to accurately image selected tissue. Applications include the imaging of radionuclide distributions within the human body or the use of a dual energy source to provide a dual photon bone densitometry apparatus that uses stationary or scanning acquisition techniques. An x-ray source generates x-rays which pass through a region of a subject's body, forming an x-ray image which reaches the scintillation screen. The scintillation screen reradiates a spatial intensity pattern corresponding to the image, the pattern being detected by a CCD sensor. The image is digitized by the sensor and processed by a controller before being stored as an electronic image. A dual energy x-ray source that delivers two different energy levels provides quantitative information regarding the object being imaged using dual photon absorptiometry techniques. Dual scintillation screens can be used to simultaneously generate images of low-energy and high-energy x-ray patterns. Each image is directed onto an associated respective CCD or amorphous silicon detector to generate individual electronic representations of the separate images.12-11-2008
20120236986Circuit Arrangement For A Directly Converting Detector And Likewise The UseThereof And A Method For Reading A Directly Converting Detector - A circuit arrangement is disclosed for a detector. In at least one embodiment, the circuit arrangement includes a directly-converting semi-conductor material and pulse-shaper in the signal readout electronics assembly. A method is disclosed for a readout of count impulses generated in the semi-conductor material, wherein part of the pulse-shaper is equipped with a relatively longer shaping time constant and a different part of the pulse-shaper is equipped with a relatively shorter shaping time constant.09-20-2012
20130163714METHODS AND APPARATUS FOR CT SMOOTHING TO REDUCE ARTIFACTS - A method for reconstructing an image of an object includes scanning an object using a computed tomographic (CT) imaging apparatus to acquire projections of the object. A set of thresholds are determined utilizing the projections, and selected smoothing kernels are associated with the thresholds. The method further includes utilizing the smoothing kernels and the projections to produce smoothed projections in accordance with the thresholds and filtering and backprojecting the smoothed projections to generate an image of the object.06-27-2013
20130163715RADIATION TOMOGRAPHY SYSTEM, RADIATION DETECTING DEVICE, AND SPATIAL RESOLUTION CHANGING METHOD FOR RADIATION TOMOGRAPHY - A radiation tomography system is provided. The radiation tomography system includes a radiation source configured to rotate around a subject and apply radiation to the subject, a plurality of radiation detecting elements disposed opposite the radiation source, a plurality of collimator plates partitioning the radiation detecting elements in a channel direction, the collimator plates erected such that plate surfaces of each of the plurality of collimator plates extend along a direction of radiation from the radiation source, and an aperture-width changing unit configured to change a width of each aperture formed by the plurality of collimator plates by moving a plurality of radiation absorbing members along respective end sides of the collimator plates close to the radiation source, the plurality of radiation absorbing members moveable between a first position at which the end sides are covered and a second position at which the end sides are exposed.06-27-2013
20130163716RADIOGRAPHIC IMAGE DETECTOR, RADIOGRAPHIC IMAGING APPARATUS, RADIOGRAPHIC IMAGING SYSTEM - The present invention provides a radiographic image detector that may maintain even resolution in 6 directions before and after 3-pixel binning process or 4-pixel binning process. A radiation detector is disposed with plural pixels that have hexagonal shaped pixel regions, arrayed in a honeycomb pattern. Scan lines connected to TFT switches in each of the pixels are disposed one for each of the pixel rows. Grouped scan lines are also disposed one for each of the pixel rows for reading and combining 3 pixels or 4 pixels worth of charges at the same timing for plural pixel groups, each configured from 3 pixels or 4 pixels in a radiation detection element. ON signals are simultaneously sent by the grouped scanned lines to the TFT switches to perform 3-pixel binning or 4-pixel binning.06-27-2013
20110116594X-RAY CT APPARATUS - Smoothing processing appropriate for a subject is performed and a CT image in which artifacts are reduced is acquired. At least a part of the X-ray detecting data 05-19-2011
20100119034COMPUTED TOMOGRAPHY DEVICE AND METHOD USING CIRCULAR-PIXEL POSITION-ADAPTIVE INTERPOLATION - A method of computed-tomography and a computed-tomography apparatus where a interpolation kernel width is adaptively determined as a function of the distance from the x-ray source to the reconstruction pixel. The width of the kernel is the projection of the reconstruction pixel on the detector. The method can be implemented in the channel direction. The method can also be implemented in the segment direction, or in the channel and segment directions at the same time. Backprojection is performed using the adaptive kernel width and may by used with helical and circular scanning, and with cone-beam or fan beam x-ray CT.05-13-2010
20120294416IMAGING DETECTOR AND METHODS FOR IMAGE DETECTION - An imaging detector includes a scintillator having a scintillator pixel that is configured to emit light. The detector also includes a photosensor that defines a photosensor pixel that is configured to absorb light emitted by the scintillator pixel. A lens is positioned between the scintillator pixel and the photosensor pixel for directing light emitted from the scintillator to the photosensor pixel. The lens is configured to converge light emitted from the scintillator pixel toward the photosensor pixel.11-22-2012
20090202036IMAGE RECONSTRUCTION WITH VOXEL DEPENDENT INTERPOLATION - A radiographic imaging apparatus includes a radiation detector (08-13-2009
20110135054APPARATUS AND METHOD FOR RECONSTRUCTION OF VOLUMETRIC IMAGES IN A DIVERGENT SCANNING COMPUTED TOMOGRAPHY SYSTEM - An apparatus and method for reconstructing image data for a region are described. A radiation source and multiple one-dimensional linear or two-dimensional planar area detector arrays located on opposed sides of a region angled generally along a circle centered at the radiation source are used to generate scan data for the region from a plurality of diverging radiation beams, i.e., a fan beam or cone beam. Individual pixels on the discreet detector arrays from the scan data for the region are reprojected onto a new single virtual detector array along a continuous equiangular arc or cylinder or equilinear line or plane prior to filtering and backprojecting to reconstruct the image data.06-09-2011
20090257553X-RAY CT APPARATUS AND IMAGE NOISE REDUCTION METHOD - An X-ray CT apparatus that can obtain a tomogram having high spatial resolution without increasing the effect of system noise and dosage is provided. The X-ray CT apparatus has an X-ray source for emitting X-ray, an X-ray detector having plural X-ray detecting elements that detect X-ray transmitted through an examinee as attenuation data and are arranged in a channel direction, a data combining unit for combining attenuation data of plural X-ray detecting elements in the channel direction to obtain composite data, a data decomposing unit for decomposing composite data to obtain respective decomposition data of the plural X-ray detecting elements, and an image re-constructing unit for re-constructing an image of the examinee by using the decomposition data.10-15-2009
20100061505EDGE DETECTION FOR COMPUTED TOMOGRAPHY PROJECTION DATA COMPRESSION - A compression subsystem for a computed tomography system compresses projection data to for efficient data transfer and storage. The compression includes detecting edges in the projection data corresponding to the object being imaged to set boundaries for compression operations. The edge detection compares difference samples to positive and negative thresholds to determine the boundaries. The projection samples or the difference samples are compressed between the boundaries. The boundaries are encoded and included in the compressed data. The compressed samples are decompressed prior to image reconstruction processing. Decompression includes decoding the compressed samples and the boundary values. This abstract does not limit the scope of the invention as described in the claims.03-11-2010
20100034345Radiation converter and method for producing the same, radiation detector and tomography device - A radiation converter is disclosed. In at least one embodiment, the converter is for x-ray or gamma radiation and includes a multiplicity of scintillation elements which are separated from one another by separating septa. To reduce cross-talk between adjacent scintillation elements, the separating septa have a layer structure. The layer structure includes two backscatter layers, between which an absorber layer which is essentially opaque to the radiation, to scatter radiation and/or scintillation light is disposed.02-11-2010
20100014632SELF-SHIELDED CT SCANNER - A CT scanner includes a pair of shields to protect an operator from x-rays from the CT scanner. The CT scanner has a gantry that provides structural support and housing for the components including an x-ray source and a detector arranged on the gantry to face one another. Lead shields are located on opposing sides of the x-ray source and extend between the x-ray source and the detector. The CT scanner further includes a computer located on an opposing side of the gantry from the x-ray source and the detector. The lead shields rotate with the gantry and prevent the x-ray from reaching the operator while the CT scanner is in operation.01-21-2010
20100014631SCINTILLATOR BASED X-RAY SENSITIVE INTEGRATED CIRCUIT ELEMENT WITH DEPLETED ELECTRON DRIFT REGION - It is described an integrated circuit design and a method to fabricate the same for a high-efficiency, low-noise, position sensitive X-ray detection in particular for medical applications. The device (01-21-2010
20100034346X-RAY IMAGING APPARATUS - An X-ray imaging apparatus includes an imaging unit which is rotatable relative to a platform about a shaft portion perpendicular to an X-ray detecting surface, so as to change the orientation relative to a subject.02-11-2010
20090190714Methods, 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.07-30-2009
20100111248APPARATUS, IMAGING DEVICE AND METHOD FOR COUNTING X-RAY PHOTONS - The invention relates to an apparatus (05-06-2010
20110261926COMPUTED TOMOGRAPHY SCANNERS, X-RAY FILTERS AND METHODS THEREOF - A computed tomography scanner may include a component mounting assembly, an x-ray tube, a filter assembly, and a detector assembly. The filter assembly filters an x-ray fan or cone beam generated by the x-ray tube such that the x-ray beam comprises a high dose portion and one or more low dose portions. The filter assembly reduces the photon count of the low dose portions. The x-ray tube may be coupled to the component mounting assembly at a first end and the detector assembly coupled at a second end that is opposite from the first end. The component mounting assembly is rotatable about a rotation axis. The detector assembly includes an array of individual detector elements capable of detecting x-ray photons of the x-ray beam. The high dose portion strikes a high resolution region of the detector assembly and the low dose portion strikes a low resolution region of the detector assembly.10-27-2011
20100027738SPECTRAL COMPUTED TOMOGRAPHY USING CORRELATED PHOTON NUMBER AND ENERGY MEASUREMENTS - A computed tomography system includes a plurality of radiation sensitive detector elements (02-04-2010
20120140875METHOD FOR OBTAINING A 3D RECONSTRUCTION OF AN OBJECT, AND X-RAY DEVICE - 3D reconstructions can be calculated from grayscale X-ray images taken at different angular positions of an X-ray source and detector rotatable about a common axis. In the present case, X-ray radiation is applied to the object to be imaged such that one half of the X-ray detector receives radiation which differs in one characteristic from the radiation received by the second half of the detector via the object. A kind of dual-energy imaging can then be carried out in a single pass through the angular positions, enabling two 3D reconstructions to be generated simultaneously and then merged.06-07-2012
20120189095PATIENT TABLE COMPRISING A POSITIONING SYSTEM AND METHOD OF USING SUCH A PATIENT TABLE - A patient table (07-26-2012
20120189094COMPUTED TOMOGRAPHY AND TOMOSYNTHESIS SYSTEM - A computed tomography system, capable of tomosynthesis, includes an inner circular gantry and an outer gantry within a housing assembly. A plurality of spaced apart radiology imaging plates are located along the inner gantry and adapted as x-ray detectors. An x-ray source is secured to the outer gantry and adapted to shoot x-rays between the spaced apart detectors and onto the patient or object while being rotated along the gantry and relative to the patient. A radiography device is moveably coupled to the inner gantry and adapted to scan and read the radiology plates and provide the data to an image processing computer. The x-ray source coupled to the outer gantry moves relative to the imaging plates such that a large number of projections can be exposed and thereafter scanned by the integral radiology device.07-26-2012
20120219107TWO-DIMENSIONAL COLLIMATOR MODULE, X-RAY DETECTOR, X-RAY CT APPARATUS, AND METHOD FOR ASSEMBLING TWO-DIMENSIONAL COLLIMATOR MODULE - A two-dimensional collimator module is provided. The two-dimensional collimator module includes first collimator plates arranged in a channel direction, second collimator plates arranged in a slice direction and combined with the first collimator plates to form a lattice, and a first block and a second block that hold the first collimator plates, wherein each of the first collimator plates is formed with slits, each of the second collimator plates is inserted through an associated row of the slits, first plate surfaces of the second collimator plates in the slice direction abut only first wall surfaces of first and second wall surfaces of the slits in the slice direction in a first set of the first collimator plates, and second plate surfaces of the second collimator plates opposite to the first plate surfaces abut only the second wall surfaces of the slits in a second set of first collimator plates.08-30-2012
20090141857Method for post-processing raw detector signals, a computer program product, a computer readible medium and a radiation detection device - Methods for post-processing raw detector signals of an x-ray or gamma detector are disclosed. According to at least one embodiment of the invention, raw detector signals are filtered, an associated filtered signal is determined at least for a subset of the raw detector signals, and those filtered signals whose signal value is less than zero are then respectively replaced by a signal value greater than zero.06-04-2009
20090046831BENCH-TOP IMAGE-GUIDED CONFORMAL IRRADIATION SYSTEM FOR LABORATORY ANIMALS - An image-guided irradiation system has a support stage, a stage-positioning assembly connected to the support stage, an x-ray source attached to a support arm in which the support arm is movable relative to the support stage, a flat-panel x-ray detector disposed proximate the support stage, and at least one of a collimator or an x-ray lens selectively disposable between the x-ray source and the support stage. The x-ray source is suitable to provide an imaging beam of X-rays at a first photon energy and is suitable to provide an irradiation beam of X-rays at a second photon energy. The collimator or x-ray lens is structured and arranged to define at least a width of the irradiation beam when it is disposed between the x-ray source and the support stage while the x-ray source is in operation.02-19-2009
20120106696GRADED RESOLUTION FIELD OF VIEW CT SCANNER - A CT scanner comprising: a rotor rotatable about an axis of rotation: an X-ray source mounted to the rotor having a focal spot from which an X-ray beam emanates; an X-ray detector array comprising a plurality of X-ray detectors for detecting X-rays in the X-ray beam; wherein the detector array has at least one high resolution region in which detectors have a high packing density and at least one low resolution region in which detectors have a low packing density and are separated by X-ray insensitive regions substantially larger than insensitive regions resulting from septa between detectors that function to reduce detector cross talk.05-03-2012
20090262886ROTATIONAL X-RAY SCAN PLANNING SYSTEM - In three-dimensional X-ray imaging, with C-arm systems, scan setup has to be performed manually under fluoroscopic control. According to an exemplary embodiment of the present invention, a scan planning system for planning a data acquisition process is provided, which is adapted to predict a field of view to be reconstructed and an image quality in the field of view with respect to the actual three-dimensional scan parameter set and previously acquired images or other information. The scan planning system may be accomplished by a stand control unit.10-22-2009
20090285354OPTICAL COHERENCE TOMOGRAPHIC IMAGING DEVICE AND IMAGING METHOD OF OPTICAL COHERENCE TOMOGRAPHIC IMAGE - An optical tomographic imaging device and the like which suppress influence in the case of a measuring beam being truncated by an iris, and can ensure reliability of a tomographic image which is acquired, when imaging the tomographic image of a retina in an eyeground of an examined eye. An optical tomographic imaging device is configured to have an observation unit observing a state of irradiating an examined object with the measuring beam, and imaging a state of the measuring beam being incident on the examined object as an observation image, a recording unit recording the observation image by linking the observation image with a tomographic image by the optical tomographic imaging device, and an evaluating unit evaluating reliability of the tomographic image which is linked with the observation image based on the observation image imaged in the observation unit.11-19-2009
20090086887RADIATION IMAGE CAPTURING APPARATUS - A radiation image capturing apparatus that includes a radiation conversion panel comprises an input device for inputting a first distance from the position of the panel to a position serving as a reference position for a subject, a distance measuring unit for measuring a second distance from the radiation source to the panel, a first radiation field calculating unit for determining a radiation field at the position of the panel based on setting information of the radiation source and the second distance, a second radiation field calculating unit for determining a hypothetical radiation field at the reference position of the subject based on the setting information of the radiation source, the first distance, and the second distance, and a life-size correcting unit for correcting the radiation image information from the panel based on the information of the calculated radiation field and the information of the calculated hypothetical radiation field.04-02-2009
20090274266X-RAY DETECTOR AND X-RAY CT APPARATUS - An X-ray detector includes a single-layered semiconductor substrate having an array of detection cells which directly convert photons of X-rays into electrical signals; a first data collecting device which collects data with respect to the array of detection cells in a photon counting mode; and a second data collecting device which collects data with respect to the array of detection cells in a current measuring mode.11-05-2009
20110206180METHOD OF AND APPARATUS FOR MEASURING CENTER DETECTOR INDEX ON CT SCANNER WITH LIMITED FIELD OF VIEW ACCESS - A position of a center detector of a radiation scanner can be determined without shutting down the scanner and/or manually positioning a phantom in the scanning field of the scanner. A phantom, comprising a target, is scanned to create an axial image of the phantom. The target is masked in the axial image, producing a masked axial image of the phantom. The masked axial image is reprojected in projection space, and the axial reprojection is compared to an axial projection or a rebinned axial projection of the phantom that was used to create the axial image. A target axial projection of data related to the masked target, created from the comparison of the axial projection or the rebinned axial projection and the axial reprojection, is used to determine the position of the center detector.08-25-2011
20120294417IMAGE DOMAIN BASED NOISE REDUCTION FOR LOW DOSE COMPUTED TOMOGRAPHY FLUOROSCOPY - A method of computed-tomography and a computed-tomography apparatus in which x-ray projection data is acquired at a number of views for a scan of an object. Partial images are created from data for a desired number of said views. Full scan images are created from plural ones of the partial images. Non-overlapping time images are created from the full-scan images. Gradient images are also created. An improved image is created by weighting respective ones of the full scan and non-overlapping time images using the gradient image. The improved image has increased sharpness with reduced noise.11-22-2012
20100061506RADIATION-AND-DETECTION SYSTEM - The invention relates to radiation-and-detection system comprising a radiation unit (03-11-2010
20090003517X-ray imaging system and method - The present invention provides an X-ray imaging system and method capable of performing time-resolved observation in a short measurement time at the same density resolution and in the same dynamic range as those for a diffraction enhanced X-ray imaging method, and also capable of observing a sample with high sensitivity even if the intensity of an incident X-ray varies with time. A refraction angle of X-ray beams caused by the sample is detected at a time by X-ray imagers by utilizing multiple X-ray diffractions by multiple analyzer crystals.01-01-2009
20080273656Advanced Convergence for Multiple Iterative Algorithm - Iterative methods for reconstructing of three-dimensional images based on projection data signals obtained by a computer tomography system often result in wrong absorption coefficients in particular for regions including a hollow space of an object under examination. Furthermore iterative methods show a slow convergence for calculating such absorption coefficients. According to embodiments of the present invention there is provided a method for an advanced reconstruction of three-dimensional images based on modified projection data signals. The modification includes an addition of a constant absorption value to the measured projection data. Advantageously the constant absorption value is an absorption line integral through a virtual body having the spatial constant absorption coefficient of water. The virtual body preferably has a volume which is slightly bigger than the object of interest.11-06-2008
20080273655Imaging Method with Back Projection - The invention relates to an imaging method, especially a computerized tomography method, with which an object is penetrated by rays from different directions and measured values, which depend upon the intensity of the rays after penetrating the object, are acquired by a detector unit. From these measured values, an object image is reconstructed by means of back projection of measured-value-dependent back projection values. Therein, the object image is divided into overlapping, quasi-spherically symmetric image segments, each being defined by an image value and a quasi-spherically symmetric base function. Furthermore, during the back projection, the back projection values are added in proportions to the image values, wherein the proportion of a back projection value, which is added during the back projection to an image value, is dependent on a proportionality factor, which is equal to the average value of the line integrals of the base function belonging to the respective image value along those rays that have generated the measured value, on which the respective back projection value is dependent.11-06-2008
20100142671SYSTEMS AND METHODS FOR IMAGING LARGE FIELD-OF-VIEW OBJECTS - An imaging apparatus and related method comprising a detector located a distance from a source and positioned to receive a beam of radiation in a trajectory; a detector positioner that translates the detector to an alternate position in a direction that is substantially normal to the trajectory; and a beam positioner that alters the trajectory of the radiation beam to direct the beam onto the detector located at the alternate position.06-10-2010
20080267347X-Ray Tomograph and Stereoradioscopic Image Constructing Equipment - An X-ray tomograph comprises an X-ray generator having a function of moving the focal position and radiating X-rays toward a subject, an X-ray image receiving element for receiving transmission images created by X-rays radiated from the X-ray generator, and an image processing section for creating a tomographic image by processing the transmission images of the subject received by the X-ray image receiving element. A stereoradioscopic image constructing equipment comprises the X-ray tomograph and a stereoradioscopic image constructing section for creating a stereoradioscopic image by subjecting the created tomographic images to image processing. By using the X-ray tomograph, a tomographic image can be created without providing any high-precision movable mechanism, and a tomographic image of even a soft subject can be correctly created.10-30-2008
20080240341HYBRID ENERGY DISCRIMINATING CHARGE INTEGRATING CT DETECTOR - An imaging system includes a gantry having a bore therethrough designed to receive a patient being translated through the bore an x-ray source disposed in the gantry and configured to emit x-rays toward the patient, and a detector module disposed in the gantry to receive x-rays attenuated by the patient. The detector module includes a scintillator configured to absorb the x-rays and to convert the x-rays into optical photons, a device configured to receive the optical photons and to convert the optical photons to electrical signals, and an adaptive data acquisition system (DAS) configured to switch an operating mode of the device from a charge integrating mode to a photon counting mode, and vice versa.10-02-2008
20110206178On-line cone beam CT reconstruction - An in-line 4D cone beam CT reconstruction algorithm, i.e. one that works in parallel with image acquisition, comprises an imaging system for a object exhibiting internal periodic motion comprising a source of penetrating radiation and a two-dimensional detector for the radiation, the source and the detector being rotatable around an axis lying on the beam path from the source to the detector, a storage means for images obtained from the detector, a control means for initiating rotation of the source and the detector and for obtaining images from the detector at a plurality of rotation angles over time, a processing means for (i) condensing the images in a direction transverse to an axis to produce a one-dimensional image, (ii) collating the one-dimensional images obtained up to that point side-by-side into a two dimensional image, (iii); analysing the two-dimensional image thus obtained to identify periodic patterns, (iv) allocating phase information to the images in the storage means on the basis of that analysis, (v) selecting images in the storage means having like phase information, and (vi) backprojecting the selected images, the control means being adapted to invoke the processing means after a plurality of images have been placed in the storage means, and then place further images in the storage means and further invoke the processing means. Thus, we queue a limited number of projection images such that the phase determination algorithm can look-ahead. At regular intervals, the queue is scanned and those images which have enough look-ahead to obtain phase information are filtered and back-projected. The algorithm thus keeps up with the image acquisition speed and produces a 4D reconstruction within a few seconds of the end of scanning. A local rigid registration algorithm is then used to match the tumor region defined in the mid-ventilation frame of our 4D planning CT with each of the phases of the 4D CBCT. An animation technique provides rapid visual verification; the mean position of the tumor is computed and used for correction, while the amplitude is reviewed to validate the margin.08-25-2011
20090161820Method for increasing the quality of computer tomographic recording series by projection data processing and CT system having a computation unit - A method is disclosed for increasing the quality of computer tomographic recording series, to a computation unit and to an X-ray CT system. An embodiment of the method includes scanning a subject over a period of time which makes it possible to record at least two temporally offset projection data sets of the same recording region; transforming the projection data sets into transformation data sets for at least two spatial frequency ranges; calculating temporal compensation values of the transformation data sets for some of the spatial frequency ranges and replacing the compensated values of the transformation data sets with the calculated compensation values in new transformation data sets, projection data of congruent rays always being compared; transforming the new transformation data sets back into new projection data sets; reconstructing image data sets on the basis of the new projection data sets and representing the image data sets.06-25-2009
20110206179Multi-View Cargo Scanner - The present invention provides a multi-view X-ray inspection system. In one embodiment, a beam steering mechanism directs the electron beam from an X-ray source to multiple production targets which generate X-rays for scanning which are subsequently detected by a plurality of detectors to produce multiple image slices (views). The system is adapted for use in CT systems. In one embodiment of a CT system, the X-ray source and detectors rotate around the object covering an angle sufficient for reconstructing a CT image and then reverse to rotate around the object in the opposite direction. The inspection system, in any configuration, can be deployed inside a vehicle for use as a mobile detection system.08-25-2011
20120069956COMPUTED TOMOGRAPHY DETECTOR MODULE - A computed tomography detector module can include a detector element, a frame, and a converter element. The detector element can be configured to detect electromagnetic radiation at a detection plane and output one or more analog detection signals. The frame can connect to the detector element and include a shield portion, parallel to the detection plane, configured to at least partially block X-rays. The converter element can include a substrate having connector and component substrate portions, the connector substrate portion thicker in a direction perpendicular to the detection plane than the component substrate portion and configured to extend through an aperture of the frame, the component substrate portion having at least one substrate surface parallel to the detection plane with one or more electrical components attached thereto. The detector module can optionally include a heat sink, which can have a top surface separated from the component substrate portion and components attached thereto by a separation gap. A computed tomography scanner can include the detector module.03-22-2012
20080317201Orthogonal reference analysis system with enhanced SNR - A method, apparatus and system for non-invasive imagining and analysis involves generating probe radiation and reference radiation that have orthogonal polarization characteristics and controlling the polarization characteristics such that substantially all the back scattered probe radiation co-propagates with controlled amounts of components of the reference radiation, thereby improving signal to noise ratios and hence performance of imaging and analysis systems. A preferred embodiment of the invention includes a rotational sensitive mirror that systematically rotates the polarization vector of higher order components of the reference radiation.12-25-2008
20080317200Method and System for Low Radiation Computed Tomography - A method for single photon counting transmission computed tomography (CT) is described. The method is based on an apparatus consisting of a radiation source and detectors on an opposite side of the subject from the source. The radiation source is for example an X-ray tube. The detectors are independently connected to parallel, fast, low-noise processing electronics capable of recording and counting individual X-ray photons at very high rate. In one embodiment of the invention, said detector is made of a scintillator coupled to a photodetector. The photodetector can be an avalanche photodiode (APD). The method comprises the steps of: directing the low energy radiation source toward the subject; detecting the radiation transmitted through the subject towards the detectors and recording the position and energy of each individual X-ray photon; rotating the radiation source and detectors around the subject; recording data for each position of the radiation source and detectors around the subject to form projections; and creating a CT image from the recorded projection data. The proposed method allows enhancing CT image contrast and reducing radiation dose to the patient by counting individual X-ray photons.12-25-2008
20080317199Medical Diagnostic Apparatus Comprising a Drive System for Positioning a Radiation Source Facing a Radiation Detector - The invention relates to a medical diagnostic device comprising a drive system (12-25-2008
20090080601METHOD AND APPARATUS FOR FLEXIBLY BINNING ENERGY DISCRIMINATING DATA - A CT detector includes a direct conversion material configured to generate electrical charge upon reception of x-rays, a plurality of metallized anodes configured to collect electrical charges generated in the direct conversion material, at least one readout device, and a redistribution layer having a plurality of electrical pathways configured to route the electrical charges from the plurality of metallized anodes to the at least one readout device. A plurality of switches is coupled to the plurality of electrical pathways between the plurality of metallized anodes and the at least one readout device, wherein each of the plurality of switches includes an input line electrically coupled to one of the plurality of metallized anodes, a first output node electrically coupled to the at least one readout device, and a second output node electrically coupled to at least one other switch of the plurality of switches.03-26-2009
20110142195Curtain Assembly, Scanning System, and Method for Assembling Scanning System - A curtain assembly includes at least one curtain including at least one slat. The at least one curtain is configured to be rotatably coupled to a housing of a scanning system having a radiation source and a detector. The at least one curtain is further configured to facilitate drawing an object into the scanning system housing while substantially preventing radiation emitted from the radiation source from exiting the housing through the at least one curtain.06-16-2011
20090097612System for 3-Dimensional Medical Image Data Acquisition - A method and system provides medical image processing and 3-dimensional image construction of an examination subject. A user is enabled to selectively orient an x-ray imaging system having a variable 3-dimensional acquisition axis relative to an examination subject support for holding an examination subject. A non-planar image data acquisition path is set for the x-ray imaging system oriented around the variable 3-dimensional acquisition axis in response to user instruction. Acquisition of image data of the examination subject is initiated by the x-ray imaging system at a plurality of points along the non-planar image data acquisition path. A 3-dimensional image is constructed from the acquired image data such that any metal artifacts introduced by radio-opaque objects within the examination subject are minimized. The 3-dimensional image is displayed.04-16-2009
20090097613NUCLEAR MEDICAL DIAGNOSIS DEVICE - A nuclear medical diagnostic device, for determining parameters T04-16-2009
20090016485X-RAY COMPUTED TOMOGRAPHY APPARATUS, RECONSTRUCTION PROCESSING APPARATUS, AND IMAGE PROCESSING APPARATUS - An X-ray computed tomography apparatus scans a subject to be examined with cone beam X-rays, and generates reference volume data on the basis of projection data. This apparatus extracts a cone beam artifact component contained in the reference volume data on the basis of the typical shape and direction of the cone beam artifact component. This apparatus generates resultant volume data with the reduced cone beam artifact by subtracting the cone beam artifact component from the reference volume data.01-15-2009
20090003518X-ray CT apparatus - An X-ray CT apparatus with a function of taking in an X-ray image data obtained by another X-ray apparatus, for use of scout view for a CT for local region of an object to be examined. The apparatus comprises an image data input means for taking in an X-ray image data as obtained by an X-ray detector of another X-ray apparatus by way of such as data importing, together with the attribute information thereon, a display operation means for displaying the X-ray image data as a scout view and receiving the operation of designating an interested area on the X-ray image; and a position control means for relatively moving the object to be examined, relative to the X-ray generator and the X-ray detector, in order to execute a CT for local region of the interested area of the object, based on the operation for the X-ray image displayed as the scout view with the display operation means or the attribute information.01-01-2009
20090220043X-RAY CT APPARATUS - To provide an X-ray CT apparatus capable of acquiring information on energy of X-rays generated by an X-ray generating apparatus, an X-ray CT apparatus (09-03-2009
20090257552Computed Tomography Systems and Related Methods Involving Multi-Target Inspection - Computed tomography (CT) systems and related methods involving multi-target inspection are provided are provided. In this regard, a representative method includes: simultaneously directing X-rays toward multiple targets from an X-ray source; during the directing of the X-rays, independently reorienting the targets with respect to the X-ray source; and obtaining information corresponding to attenuation of the X-rays attributable to the multiple targets for producing computed tomography images of the targets.10-15-2009
20080260094Method and Apparatus for Spectral Computed Tomography - An apparatus receives signals generated by a detector (10-23-2008
20120033784X-RAY DETECTOR AND X-RAY COMPUTER TOMOGRAPHY SCANNER - According to one embodiment, an X-ray detector includes a plurality of detection packs and a plurality of heaters. Each of the detection packs includes a plurality of detection elements that detect X rays having passed through a subject and output a detection signal corresponding to the X rays and is arranged along a predetermined direction. Each of the heaters is provided corresponding to each of the detection packs and individually controls the temperature of each of the detection packs.02-09-2012
20100002832Medical X-Ray Imaging Apparatus - The invention relates to a medical X-ray imaging apparatus comprising a frame part, an X-ray source for producing X-rays, radiation receiving means for detecting radiation transmitted through an object, and support means for supporting the X-ray source and the receiving means in positions on opposite sides of the object. The support means are connected to the frame part so as to rotate around the axis of rotation provided with actuator means for rotating the said support means around the said axis of rotation. The apparatus makes possible both panoramic imaging and CT imaging, as selected by the operator. The X-ray apparatus comprises means for adjusting the ratio of enlargement so as to be optimal for each method of imaging used respectively.01-07-2010
20110129061COMBINED NUCLEAR-RADIOGRAPHIC SUBJECT IMAGING - When performing a patient scan to collect patient data for reconstruction into one or more image volumes, a combination nuclear-radiographic subject imaging device (06-02-2011
20100220833DETECTOR ARRAY FOR SPECTRAL CT - A radiation detector (09-02-2010
20130216019X-RAY CT APPARATUS AND MEDICAL IMAGE DISPLAY METHOD - The collecting part of the X-ray CT apparatus according to the embodiment scans a subject using X-rays and collects data. The memory prerecords a basic image including the designated area of the subject. The controller instructs the collector to repeatedly perform the first scan, using the conditions for the first scan, of the designated area of the subject to who contrast agent has been administered. The controller then receives the specified trigger input, and instructs the second scan of the subject using the conditions for the second scan. The image generator repeatedly produces the first medical image based on the data collected when the first scan is being performed, and produces a subtraction image from the first medical image and the basic image. The image generator then produces the second medical image based on the data collected when the second scan is being performed.08-22-2013
20110058646Transportation container inspection system and method - In exemplary embodiments of the present invention, containers, such as, for example, those used in transportation and shipping, can be inspected by using a CT X-ray scanning system with a large area detector plate. In exemplary embodiments of the present invention the detector plate can directly convert X-rays transmitted through the container into visible light, thus forming light patterns on the outer surface of the plates. The plates can then be analyzed using, for example, CCD or ICCD cameras and a data processor so as to form real-time 2D and/or 3D images of objects in the container. In exemplary embodiments of the present invention each such plate can comprise a coating of X-ray converting material such as, for example, a phosphor on a metallic plate. In exemplary embodiments of the present invention an exemplary scanning system can, for example, rotate a rotor having an X-ray source on one side of an axis of rotation, and a detector including such detector plates on the other side of the axis. In exemplary embodiments of the present invention a container can be moved, through an opening in the rotor and support structure in synchronization with the rotor, such as, for example, by transporting the container on rails.03-10-2011
20100135455DIGITAL INTEGRATION WITH DETECTOR CORRECTION - The present invention relates to systems and methods for reducing motion artifacts in x-ray imaging systems. The detector system output is sampled at a rate than the x-ray exposure rate to reduce blurring associated with motion of the detector and/or object being scanned.06-03-2010
20100034347Scatter Attenuation Tomography - A system and methods for characterizing an inspected object on the basis of attenuation determined from pair-wise illuminated voxels. A beam of penetrating radiation characterized by a propagation direction and an energy distribution is scanned relative to an object, while scatter detectors with collimated fields-of-view detect radiation scattered by each voxel of the inspected object that is intercepted by the incident beam of penetrating radiation. By calculating the attenuation of penetrating radiation between pairs of voxels illuminated sequentially by the incident beam, a tomographic image is obtained characterizing the three-dimensional distribution of attenuation in the object of one or more energies of penetrating radiation, and thus of various material characteristics.02-11-2010
20090041181COOLING SYSTEM FOR GANTRY-MOUNTED COMPONENTS OF A COMPUTED TOMOGRAPHY SYSTEM - A computed tomography apparatus has a gantry for mounting components of an acquisition system that are arranged such that they can rotate around a system axis, and a stationary part in which the gantry is supported such that it can tilt. A device for cooling the components by airflow is arranged on the gantry. The cooling device has at least one feed channel and at least one air discharge channel that are arranged between the stationary part and the gantry so that the air current introduced into the gantry via the stationary part is conducted out from the gantry into the stationary part in a directed manner after cooling the components. The direction of the air current directed from the computed tomography apparatus thus does not depend on the tilt of the gantry. Moreover, the computed tomography apparatus is designed such that cooling is achieved with low noise emission since the direct sound propagation path between the exit opening and the gantry is interrupted.02-12-2009
20090074135Method for generating an image sequence for a 3D reconstruction - When recording an image sequence, it is possible to deviate from passing through a perfect curve path. There is described how an alternative curve path can be determined. An envelope is determined, a point is determined, which is the center point of the region of interest and then the detector is moved such that it is at right angles in each instance to a line which emanates from the point and simultaneously touches the envelope tangentially. As a result, the region of interest is mapped as optimally as possible in the image sequence so that as good a 3D reconstruction as possible can be obtained.03-19-2009
20090074134Linear accelerator with wide bore CT scanner - A system according to some embodiments may include a treatment head to emit a megavoltage radiation beam toward a volume, a plurality of X-ray sources to emit a respective kilovoltage radiation beam toward the volume while the plurality of X-ray sources are substantially stationary with respect to the volume, a detector to receive the plurality of kilovoltage radiation beams after having passed through the volume, and a processor to generate a three-dimensional image of the volume based only on the plurality of kilovoltage radiation beams received by the detector while the plurality of X-ray sources were substantially stationary with respect to the volume.03-19-2009
20090074132COMPUTER TOMOGRAPHY APPARATUS AND METHOD OF EXAMINING AN OBJECT OF INTEREST WITH A COMPUTER TOMOGRAPHY APPARATUS - A computer tomography apparatus (03-19-2009
20100220834Method for Producing Projective and Tomographic Images Using an X-Ray System - An embodiment of the present invention discloses a method for producing projective and tomographic images using X-rays, allowing structures of similar composition to be imaged particularly well by combined evaluation of the behaviour of the test object with respect to the phase displacement during passage of the X-rays and its absorption. At least one embodiment of the invention also relates to an X-ray system and a CT system with respective source grids, phase grids, and analytical grids for carrying out the method.09-02-2010
20080310585DETECTOR ARRAY AND SYSTEM - In some embodiments, an optical mask for a CT detector is disclosed. In some embodiments, the mask is intercalated between a photodiode array and a scintillator array forming the CT detector. In some embodiments, the optical mask may extend along one or more axes and differentially absorbs and/or reflects light emitted from the scintillators at edges of photodiodes forming the diode array, with less absorption or reflection at edges of tiled die forming the diode array than in central portions of each of the die. Through selective absorption and/or reflection, transference of light photons from a scintillator to the photodiode corresponding to a neighboring scintillator is spatially modified, at least partially compensating for spatial differences in crosstalk signals between adjacent pairs of photodiode/scintillator cell elements. This reduction in differential crosstalk reduces artifacts in a reconstructing data descriptive of internal portions of a subject, which improves diagnostic value of the data.12-18-2008
20130129037X-RAY CT APPARATUS AND IMAGE PROCESSING APPARATUS - According to one embodiment, an X-ray CT apparatus includes an generation unit, detection unit, processing unit, and reconstruction unit. The generation unit irradiates an object with X-rays. The detection unit includes detection elements corresponding to a plurality of channels, which output detection signals upon detecting X-rays. The processing unit smoothes projection data constituted by numerical values corresponding to signals output from the elements so as to more strongly smooth a portion exhibiting a larger amount of change in the numerical value. The reconstruction unit reconstructs an image by using a plurality of projection data smoothed by the image processing unit.05-23-2013
20090110141COMPUTED TOMOGRAPHY WITH RESOLUTION RECOVERY - A system and method for recovering resolution in an x-ray computed tomography system. The system includes an x-ray source, a two-dimensional sensing array, and a controller. The x-ray source projects an x-ray beam towards subject. The x-ray source includes an anode and a cathode, where the anode has a target for directing the x-ray beam. A two-dimensional sensing array receives an x-ray beam through the subject to generate an image. The target of the anode causes a shift variant blur of the x-ray beam received by the sensing array due to the angle between the target and the sensing array. The controller is in communication with the sensing array to control acquisition and processing of the image. The controller is configured to adjust for the shift variant blur of the x-ray beam.04-30-2009
20090067571COMPUTED TOMOGRAPHY SYSTEM AND APPARATUS - A computed tomography system is disclosed herein. The computed tomography system includes a rotatable gantry portion and an x-ray source mounted to the rotatable gantry portion. The computed tomography system also includes a detector assembly mounted to the rotatable gantry portion and positioned to receive an x-ray beam from the x-ray source. The detector assembly includes a plurality of x-ray attenuating collimation plates with a generally x-ray translucent stiffening member attached to one or more of the plurality of x-ray attenuating collimation plates.03-12-2009
20110026669ADJUSTABLE SCANNER - For dental and facial imaging, a source of x-rays (02-03-2011
20100177865X-ray ct imaging apparatus - An X-ray CT imaging device applies an X-ray cone beam to an object and generates an X-ray CT image based on the X-ray which has passed through the object. An image generation unit generates an image by superposing an imaging target region display on a position setting image indicating the object and displays the obtained image on a display unit. The image generation unit modifies the imaging target region display in accordance with an X-ray CT imaging mode selected by an imaging mode selection unit.07-15-2010
20090034679RADIOGRAPHIC APPARATUS AND RADIATION DETECTION SIGNAL PROCESSING METHOD - A radiographic apparatus according to this invention, when a predetermined operation relating to radiographic imaging is interposed during an emission of radiation, stops the emission temporarily, and also stops a recursive computation temporarily. With start of the predetermined operation, the emission is started again and also the recursive computation is started again. Radiation detection signals at the time of non-emission due to the temporary stop are acquired, and the recursive computation is carried out based on initial values derived from the radiation detection signals at the time of non-emission. The lag-behind parts are removed from the radiation detection signals with increased accuracy while reducing the trouble of radiographic images caused by the predetermined operation relating to radiographic imaging being interposed during an emission of radiation.02-05-2009
20100172467APPARATUS AND METHOD FOR GENERATING COUNTABLE PULSES FROM IMPINGING X-RAY PHOTONS; AND CORRESPONDING IMAGING DEVICE - The present invention relates to an apparatus (07-08-2010
20100172466RADIATION DETECTOR WITH COUNTING ELECTRONICS - The invention relates to a radiation detector, particularly an X-ray detector (07-08-2010
20110116595Method and Apparatus for Detecting Low and High X-Ray Flux - A method and apparatus for detecting low and high x-ray densities is provided for use in CT imaging. Two photodetectors, one having a relatively low dynamic range and the other having a relatively high dynamic range, are coupled to the same transducer. The first photodetector may be, for example, a SiPM which is passively quenched.05-19-2011
20090016484SCANNING DETECTION DEVICE OF AN X-RAY CT APPARATUS, AN X-RAY CT SYSTEM AND METHOD OF OPERATION OF THE SAME - Method of operating an X-ray CT apparatus and the corresponding apparatus and system thereof. A method includes analyzing scout scan data to obtain a position with a minimum noise index and a position with a maximum noise index, calculating noise indexes at the two positions in a range of a maximum and a minimum tube current that can be provided by the system by means of a tube current control model so as to obtain two ranges of noise index, and determining whether there is an intersection between the two ranges of noise index. If such an intersection exists, a combination of the range of tube current value and the range of noise index that meets the requirement is selected within the intersection to control the system to proceed with a subsequent scan. If no such intersection exists, the system ends the present scan.01-15-2009
20110243299X-RAY INSPECTION APPARATUS AND X-RAY INSPECTION METHOD - An X-ray inspection apparatus includes a scanning X-ray source for emitting an X-ray, an X-ray detector drive unit having a plurality of X-ray detectors mounted thereon and being capable of independently driving the plurality of X-ray detectors, and an image acquisition control mechanism for controlling the X-ray detector drive unit and acquisition of image data from the X-ray detectors. The scanning X-ray source emits an X-ray by moving an X-ray focal point position of the X-ray source to each of originating point positions of X-ray emission, which are set for the X-ray detectors such that X-rays are transmitted through a plurality of prescribed inspection areas of an inspection object and enter the X-ray detectors. Image pickup by the X-ray detector and movement of another X-ray detector are concurrently performed in an alternate manner. The image acquisition control mechanism acquires image data, and an operation unit reconstructs an image.10-06-2011
20120243661DATA ACQUIRED SYSTEM AND CT APPARATUS USING THE SAME - A data acquired system is provided. The data acquired system includes a main structure with a cavity formed therein, the cavity having a bottom for mounting a circuit board with electrical components thereto, a fan assembly disposed on the main structure, and an airflow guide disposed within the cavity and configured to guide airflow from the fan assembly for heat dissipation of the electrical components, the airflow guide positioned at a distance above the electrical components to form a gap between the airflow guide and the electrical components, wherein a sidewall of the cavity is provided with an air vent corresponding to the gap such that the airflow passes through the gap and is discharged from the air vent.09-27-2012
20120243659ARC-SHAPED MEDICAL IMAGING EQUIPMENT - Medical imaging equipment is provided. The medical imaging equipment comprises a support assembly, an arc-shaped member slidably mounted on the support assembly, a radiation source mounted on the arc-shaped member in the vicinity of a first distal end of the arc-shaped member and being oriented to radiate along the direction of an imaging axis, and a detector mounted on the arc-shaped member in the vicinity of the second distal end of the arc-shaped member and being oriented to face the source along the imaging axis, wherein the radiation source and the detector are respectively mounted on one side and the other of the mid plane of the arc-shaped member.09-27-2012
20110211668CONVERTER ELEMENT FOR A RADIATION DETECTOR - The invention relates to converter element (09-01-2011
20110211669RADIATION DETECTOR WITH AN ARRAY OF ELECTRODES - The invention relates to a radiation detector (09-01-2011
20110150176IMAGE PROCESSING WITH COMPUTER AIDED DETECTION AND/OR DIAGNOSIS - The invention relates to a method and an image processing device (06-23-2011
20100054396METHOD OF CALIBRATION FOR COMPUTED TOMOGRAPHY SCANNERS UTILIZED IN QUALITY CONTROL APPLICATIONS - A method of calibrating a computed tomography system includes the steps of mounting a scan geometry defining tool on a rotating object positioning unit of a computer tomography scanner. The scan geometry defining tool has structure of precisely measured dimensions. A beam is directed from an x-ray source of the computed tomography system through the structure of the scan geometry defining tool. A detected image after absorption of the x-ray from the scan geometry defining tool is analyzed, and utilized to determine a distance from the x-ray source spot location to the center of rotation of the object positioning unit. A beam is also directed from the x-ray source through a system performance test standard tool and analyzes a number of electronic and computer performance characteristics. The analyzed characteristics can be compared to expected characteristics to provide feedback on the operation of electronic and computer functions within the computed tomography system.03-04-2010
20110176656SOLID-STATE IMAGE PICKUP DEVICE - A solid-state image pickup device 07-21-2011
20110103545COMPUTED TOMOGRAPHY METHOD AND APPARATUS FOR CENTRE-OF-ROTATION DETERMINATION - A method and apparatus is disclosed for determining the central ray of scanning an object on a detector in a computer tomography system. The method comprises producing a fan beam of x-rays at a fixed x-ray source and detecting the x-rays at the detector. The scanning projection data of the object under examination is received and the object is rotated under examination using a manipulator. After calculating the opposite projection pixel position and projection angle for each pixel, a mismatching is measured between the grey levels of all pixels and their calculated opposite projection pixels with a set of assumed central ray, and identifying the minimum of the measurement as the true central ray.05-05-2011
20110103544DIAGNOSTIC IMAGING SYSTEM AND METHOD USING MULTIPLE TYPES OF IMAGING DETECTORS - A diagnostic imaging system and method using multiple types of imaging detectors are provided. The imaging system includes a gantry having a rotor and a stator and a pair of gamma detectors coupled to the rotor. The imaging system further includes a gamma detector coupled to the stator. The gamma detector coupled to the stator is different than the pair of gamma detectors coupled to the rotor.05-05-2011
20090028292COMPUTED TOMOGRAPHY SYSTEM WITH STATIONARY ANODE RING - A computer tomography system has a stationary x-ray tube, that has an anode ring and at least one cathode ring, that extends through 360° in a system plane perpendicular to a system axis, and a vacuum region that is at least partially delimited by a light-permeable and/or infrared-permeable vacuum window is provided between the anode ring and the at least one cathode ring. A support frame is rotatable around the system axis parallel to the system plane, on which are arranged, in at least one angle position, a system with at least one laser for local activation of electron emission at the at least one cathode ring, and a filter and/or collimator set, and a radiation detector opposite the filter and collimator set.01-29-2009
20090028291X-RAY SYSTEM AND METHOD FOR IMAGE COMPOSITION - In an x-ray system and a method for image composition, congruent optical images and x-ray images of subjects provided with markers are generated. A transformation matrix/imaging matrix is formed and applied to the congruent x-ray images based on the detected identical markers in optical images. The transformation matrix is used to compose an aggregate image from the x-ray images.01-29-2009
20100128842CT SCANNER APPARATUS - A Computerized Tomography (CT) scanner apparatus includes a scanner gantry, a detector, a detector control panel configured to control the detector, and a power ring. The scanner gantry includes a rotary part and a stationary part, wherein the detector, the detector control panel, and the power ring are mounted in the rotary part. The detector control panel is configured to transmit a scan data signal collected from the detector from the rotary part of the scanner gantry to the stationary part via a power line on the power ring.05-27-2010
20110080994INTEGRATED X-RAY DETECTOR ASSEMBLY AND METHOD OF MAKING SAME - An x-ray detector assembly includes a first curvilinear detector assembly comprising a first plurality of detector modules, a second curvilinear detector assembly comprising a second plurality of detector modules, and a first flat panel digital projection detector arranged between the first and second curvilinear detector assemblies such that a first end of the first flat panel digital projection detector is coupled to an inner end of the first curvilinear detector assembly and a second end of the first flat panel projection detector is coupled to an inner end of the second curvilinear detector assembly.04-07-2011
20110080993STACKED X-RAY DETECTOR ASSEMBLY AND METHOD OF MAKING SAME - An x-ray detector assembly includes a curvilinear detector assembly that has a first side section that includes a first plurality of detector modules, a second side section that includes a second plurality of detector modules, and a third section that includes a third plurality of detector modules. The third section is positioned between the first and second side sections in a channel direction. The x-ray detector assembly also includes a first flat panel digital projection detector and a first detector mounting structure that is configured to align the first flat panel digital projection detector in a first position to block the third section of the curvilinear detector assembly from receiving x-rays emitting from an x-ray source toward the curvilinear detector assembly in the x-ray penetration direction.04-07-2011
20110080995STACKED FLAT PANEL X-RAY DETECTOR ASSEMBLY AND METHOD OF MAKING SAME - An x-ray detector assembly includes a first flat panel digital projection detector and a second flat panel digital projection detector. The x-ray detector assembly further includes a first detector mounting structure configured to align the first flat panel digital projection detector in a first position to block the second flat panel digital projection detector from receiving x-rays emitting from an x-ray source toward the second flat panel digital projection detector in an x-ray penetration direction.04-07-2011
20080253507Computed Tomography Detector Using Thin Circuits - An x-ray detector array (10-16-2008
20080253508Method for distinguishing between four materials in tomographic records of a dual-energy CT system - A method and a CT system are disclosed having a computation unit for distinguishing between four materials (M10-16-2008
20100260314PHOTODETECTION UNIT, PHOTODETECTOR, AND X-RAY COMPUTED TOMOGRAPHY APPARATUS - A photodetecting unit having a favorable attaching operability is provided.10-14-2010
20100260313X-RAY CT APPARATUS - An X-ray CT apparatus has: a plurality of X-ray detection elements arranged in a matrix form; a QV amplifier unit having a plurality of QV amplifiers;10-14-2010
20100098210Direct radiation converter - A direct radiation converter is disclosed. In at least one embodiment, the direct radiation converter is operated using a direct conversion element having a temperature of at least 38° C. and at most 55° C., and designed for detecting X-ray radiation.04-22-2010
20090279660X-RAY COMPUTED TOMOGRAPHIC APPARATUS - A rotor is rotatably supported in a gantry housing having a substantially sealed structure. An X-ray tube is provided in the rotor. A cooler is provided in the rotor and cools a refrigerant within the X-ray tube. An X-ray detector is provided in the rotor. A reconstruction unit reconstructs an image on the basis of an output of the X-ray detector. A radiator is fixed inside the gantry housing at a position opposite to an exhaust opening of the cooler when the rotor is stationary.11-12-2009
20090022271X-RAY IMAGING APPARATUS - An X-ray imaging apparatus includes a substantially C-arm, a support mechanism which rotatably supports substantially the C-arm, a rotation driving unit which drives rotation of substantially the C-arm, an X-ray tube mounted on substantially the C-arm, an X-ray detector mounted on substantially the C-arm, and a control unit which controls at least one of the rotation driving unit and an imaging control unit to make intervals between a plurality of contrast-enhanced images shorter than intervals between a plurality of mask images by changing a rotational speed of substantially the C-arm before and after injection of a contrast medium.01-22-2009
20090022270X-Ray Image Sensor and X-Ray Imaging Apparatus Using the Same - An X-ray image sensor (01-22-2009
20080205586RADIATION DETECTOR AND X-RAY CT APPARATUS - A radiation detector includes a detector block, cables, connectors, and circuit substrates. The detector block has a plurality of radiation detector modules arranged in a slice direction. The cables extend in the slice direction and configured to receive signals from the radiation detector modules of the detector block. The connectors are associated with the cables, respectively, and are spaced, one from another, in the slice direction. The circuit substrates are configured to receive signals via the connectors from the radiation detector modules of the detector block.08-28-2008
20110255658X-RAY CT APPARATUS AND X-RAY DETECTOR - An X-ray detector of an X-ray CT apparatus has a plurality of collimators, a plurality of scintillators, a plurality of photodiodes and a light guide. The plurality of collimators collimate an X-ray. The plurality of scintillators respectively emit fluorescence based on the X-ray from the plurality of collimators. The plurality of photodiodes respectively convert the fluorescence from the plurality of scintillators into the electric signal. The light guide has such a shape as to guide the fluorescence emitted from the plurality of scintillators respectively to the plurality of photodiodes while focusing the fluorescence toward the plurality of photodiodes.10-20-2011
20120148015COMPUTER TOMOGRAPHY DEVICE - A computer tomography device for non-medical applications, in particular a non-medical material or workpiece test, having a sensor carrier unit comprising a plurality of individual pixels provided adjacent to one another, said sensor carrier unit being designed to detect invasive radiation of an x-ray radiation source by a detector surface. The detector surface extends in at least one plane in the shape of an arc, wherein the sensor carrier unit has a contour that is arced at least in sections and/or comprises a plurality of individual detector elements (06-14-2012
20080205585Energy-Resolved Photon Counting For Ct - Spectral CT systems require cheap detectors with high energy resolution. According to an aspect of the present invention, a computer tomography apparatus comprises a detector element which is segmented into a plurality of sub-pixels. Each sub-pixel has at least two thresholds and counting channels, wherein the second threshold for each sub-pixel varies over the nominal detector element. This may provide for an improved energy-resolved photon counting.08-28-2008
20110255659X-RAY CT APPARATUS AND X-RAY DETECTOR - An X-ray detector of an X-ray CT apparatus has a collimator, a plurality of scintillators, a light reflector and a plurality of photodiodes. The collimator has a threshold plate with a thickness Wc to eliminate scattered radiation from an X-ray. The plurality of scintillators emit light based on the X-ray. The light reflector is provided in a gap between adjacent scintillators of the plurality of scintillators. The plurality of photodiodes convert the light of each of the plurality of scintillators into the electric signal. The thickness Wc of the threshold plate mounted on the X-ray incident side of the adjacent scintillators, and a thickness Ws of the gap has a relationship shown in a following expression: Wc≧Ws.10-20-2011
20110019794ELECTRICAL ISOLATION OF X-RAY SEMICONDUCTOR IMAGER PIXELS - To mitigate the influence of charge sharing occurring in semiconductor detectors, an improved semiconductor detector (01-27-2011
20110096895COLLIMATOR MODULE, X-RAY DETECTOR, X-RAY CT DEVICE, AND ASSEMBLING METHOD OF COLLIMATOR MODULE - A collimator module (04-28-2011
20110096894X-RAY DIAGNOSTIC APPARATUS - According to one embodiment, an X-ray diagnostic apparatus includes an X-ray tube, first detector, second detector, arm, sliding mechanism, tilting mechanism, and control unit. The X-ray tube includes an anode to generate X-rays upon receiving electrons. The first detector has the first pixel size. The second detector has the second pixel size smaller than the first pixel size. The arm pivotally supports the X-ray tube, first detector, and second detector. The sliding mechanism slidably supports the first and second detectors so as to irradiate one of the first and second detectors with the X-rays generated by the X-ray tube. The tilting mechanism tiltably supports the X-ray tube to change the size of an effective X-ray focal spot on the anode. The control unit controls the sliding of the first and second detectors by the sliding mechanism upon interlocking with the tilting of the X-ray tube by the tilting mechanism.04-28-2011
20100215142Graded resolution field of view ct scanner - A CT scanner comprising: a rotor rotatable about an axis of rotation: an X-ray source mounted to the rotor having a focal spot from which an X-ray beam emanates; an X-ray detector array comprising a plurality of X-ray detectors for detecting X-rays in the X-ray beam; wherein the detector array has at least one high resolution region in which detectors have a high packing density and at least one low resolution region in which detectors have a low packing density and are separated by X-ray insensitive regions substantially larger than insensitive regions resulting from septa between detectors that function to reduce detector cross talk.08-26-2010
20100166141Wide-coverage x-ray source with dual-sided target - An x-ray source is disclosed comprising: an anode disk with first and second beveled annuli at a periphery of the anode disk, the anode disk rotatably coupled to a housing structure via a support shaft; first and second cathodes mounted to a yoke support structure, the yoke support structure configured to direct cathode emissions at x-ray generating material disposed on the beveled annuli; and a high-voltage insulator configured to electrically insulate the yoke support structure from the housing structure.07-01-2010
20110051888Electronic Packaging Technique to Improve Sensor Failure Robustness - A modular sensor assembly comprises: sensor arrays electrically coupled to a sensor substrate; a plurality of integrated circuits with sensor signal processors electrically coupled to a package substrate; and an interconnect assembly including electrical paths configured to electrically couple analog output signals from a first sensor array to a first integrated circuit and from a second sensor to a second integrated circuit, the first sensor disposed adjacent to the second sensor.03-03-2011
20110261925GRID APPARATUS AND X-RAY DETECTING APPARATUS - A grid apparatus of an X-ray detecting apparatus is provided. The grid apparatus includes an X-ray absorbing material for absorbing X-rays that are scattered from an object, and an X-ray passing material formed between the X-ray absorbing materials to allow X-rays to pass therethrough. The X-ray absorbing material and the X-ray passing material form a line pattern forming a predetermined angle with a line pattern of pixels of an X-ray detector. The grid apparatus enables simpler implementation of a grid noise reduction algorithm and reduces the time and labor for reducing grid noise.10-27-2011
20110188626Damage Evaluation Apparatus, and Damage Evaluation Method - Provided is a damage evaluation apparatus capable of evaluating the damage of an asphalt mixture or the like non-destructively for a short time and in a precise manner. This apparatus turns a sample (S) and irradiates it at every predetermined angle with an X-ray so that it detects the transmitted X-ray with an X-ray detector (08-04-2011
20100020923X-RAY CT SCANNER AND IMAGE CREATING METHOD - In an X-ray CT scanner having an X-ray tube which applies an X-ray spreading in a body axis direction of a subject, and an X-ray detector having a wide imaging range which detects the X-ray passed through the subject and converts the detected X-ray into an electric signal, a desired image creation time is set by use of a specific CT value curve in a console input unit before scanning with the X-ray. After the scanning, data of the CT value change curve is generated based on the obtained projection data. An image creation range in the generated change curve is determined based on an image creation range set in the console input unit, and the image creation is performed in the image creation unit based on the determined image creation time.01-28-2010
20100020924APPARATUS, IMAGING DEVICE AND METHOD FOR COUNTING X-RAY PHOTONS - The present invention relates to an apparatus (01-28-2010
20100020922APPARATUS AND METHOD FOR SPECTRAL COMPUTED TOMOGRAPHY - A computed tomography system includes a radiation sensitive detector element (01-28-2010
20100020921SYSTEM AND METHOD FOR GENERATING COMPUTED TOMOGRAPHY IMAGES - A computed tomographic imaging system is provided for generating computed tomography images. The computed tomographic system includes a processor configured to access image data encoding X-ray projections at a detector position and a plurality of X-ray source beam focal spot positions and to align pixel values for the projections in a direction of deviation of the positions. The processor is also configured to determine a correction factor for at least one of the projections based upon the aligned pixel values and upon a sum of the projections and to correct the pixel values for the at least one of the projections based upon the correction factor.01-28-2010
20090135995Tomographic Mammography Method - A tomosynthesis system for forming a three dimensional image of an object is provided. The system includes an X-ray source adapted to irradiate the object with a beam of X-rays from a plurality of positions in a sector, an X-ray detector positioned relative to the X-ray source to detect X-rays transmitted through the object and a processor which is adapted to generate a three dimensional image of the object based on X-rays detected by the detector. The detector is adapted to move relative to the object and/or the X-ray source is adapted to irradiate the object with the beam of X-rays such that the beam of X-rays follows in a non arc shaped path and/or a center of the beam of X-rays impinges substantially on the same location on the detector from different X-ray source positions in the sector.05-28-2009
20090074133Reconstruction Method for Computer Tomograph and Computer Tomograph - It is an object of the invention to provide spiral computer tomography which has a high image quality. It relates to a reconstruction method for computer tomography of the heart, wherein the image is reconstructed from a data component of recordings of a partial detector path of a detector device and from a data component of recordings of a full detector path of the detector device, and to a computer tomograph having a beam source, a drive arrangement for driving the beam source in a spiral path around an object, a detector device for recording the radiation from the beam source which passes at least partially through the object, and a control device for reconstructing data components of a partial detector path and a full detector path.03-19-2009
20090213985SYSTEM 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.08-27-2009
20120177174TEMPERATURE DRIFT CORRECTION FOR MULTI-SLICE DETECTOR IN COMPUTED TOMOGRAPHY - A system and method for temperature drift correction capability in a CT detector module is disclosed. A scintillator array of a CT detector module has a plurality of scintillator cells configured to detect high frequency electromagnetic energy passing through an object, with a plurality of photodiodes in a photodiode array optically coupled to the scintillator array to detect light output therefrom. A computer is provided that is programmed to measure a response of the plurality of photodiodes as a function of temperature, determine a transfer function indicative of the response of the plurality of photodiodes as a function of temperature, normalize the transfer function to a virtual operating temperature, measure a temperature of the photodiode array prior to a scan, determine a correction factor from the normalized transfer function based on the measured photodiode temperature and the virtual operating temperature, and apply the correction factor to the photodiode outputs.07-12-2012
20120008738COMPUTED TOMOGRAPHY SCANNING SYSTEM - A system for recording CT data of an object in an object area (01-12-2012
20120008737DETERMINING A PHASE OF AN OBJECT MOVEMENT IN A SERIES OF IMAGES - A method for determining a movement phase of a periodically moving object in a plurality of sequentially produced images in a series of images of the periodically moving object. The method includes registering different images in the series of images. The method also includes determining a deformation that has occurred between the registered images. The method further includes—determining the phase of the movement of the moving object for at least one of the images in the series of images based upon the determined deformation.01-12-2012
20120014503Computed Tomography Scanning System and Method - A system for recording computed tomography image data of an object in an object area comprises an X-ray source and an X-ray detector arranged at either side of the object area, the X-ray source having a flying focal spot from which X-rays is emitted and the X-ray detector comprising pixels arranged in at least one row for recording images of the object. A device is provided for rotating the X-ray source and the X-ray detector with respect to the object around an axis of rotation, while the at least one row of pixels record images of the object. The X-ray source comprises means for moving the flying focal spot of the X-ray source from an original position and in a direction essentially opposite to the direction the X-ray source moves during the rotation, and the X-ray detector is provided with means for time delay summation such that pixel signal values of the at least one row of pixels are shifted one pixel and summed with pixel signal values obtained in a following recording of an image, wherein the shifting and summing of pixel signal values are performed repeatedly and the pixel signal values are shifted in a direction essentially opposite to the direction the X-ray detector moves during the rotation.01-19-2012
20120014502ASYMMETRIC DE-POPULATED DETECTOR FOR COMPUTED TOMOGRAPHY AND METHOD OF MAKING SAME - A computed tomography (CT) detector array includes a central region substantially symmetric about a central axis thereof and includes a first plurality of x-ray detector cells configured to acquire CT data from a first number of detector rows during a scan, wherein the central axis is in a channel direction of the CT detector array and transverse to a slice direction of the CT detector array. A first wing is coupled to a first side of the central region, and a second wing is coupled to a second side of the central region opposite the first side. The first and second wings include respective second and third pluralities of x-ray detector cells and are each configured to acquire CT data from a number of detector rows that is less than the first number of detector rows. The CT detector array is asymmetric about the central axis of the central region.01-19-2012
20120155606COMPUTER TOMOGRAPHIC WORKPIECE MEASURING DEVICE - A marine device has a floating buoy containing electronics, a submerged payload containing electrical devices and electronics, a power source and a mooring line. At least a part of the power source is submerged and electrically connected to at least one of the submerged payload and the floating buoy, and the mooring line extends between the buoy and at least one of the power source submerged part, the submerged payload and a submerged anchor having a mass allowing it to stay under the water surface.06-21-2012
20090129540Correcting transverse scattering in a multi-emitter CT scanner - A multi-emitter computed tomography scanner is disclosed, including a plurality of x-ray emitter/detector arrangement pairs arranged offset at an angle to one another. In at least one embodiment, the detector arrangements of the pairs are designed to be energy selective.05-21-2009
20120300899IMAGE PROCESSING DEVICE, RADIOGRAPHIC IMAGE CAPTURE SYSTEM, IMAGE PROCESSING METHOD, AND IMAGE PROCESSING PROGRAM STORAGE MEDIUM - An image processing device includes a tomographic image generating section that acquires generates tomographic images, a display processing section that displays a second radiographic image, and detection section. If a region of interest is specified on the second radiographic image, the detection section performs image analysis by comparing the region of interest with corresponding regions that are regions in the tomographic images corresponding to the region of interest, and detects a tomographic image including a corresponding region that is similar to the region of interest. If a position of interest is specified on the second radiographic image, the detection section performs image analysis by comparing the position of interest with corresponding positions that are positions in the tomographic images corresponding to the position of interest, and detects a tomographic image including a corresponding position that is similar to the position of interest.11-29-2012
20120155607BELT-TYPE TABLE AND CT APPARATUS AND A METHOD FOR OBTAINING CALIBRATION DATA FOR A CT APPARATUS - A belt table is provided. The belt table includes a cradle, and a movement driver set configured to drive the cradle to move, wherein the cradle and the movement driver set are configured to cause at least one of low attenuation and nearly zero attenuation to X-rays along a scan plane.06-21-2012
20130010921X-RAY COMPUTED TOMOGRAPHY APPARATUS AND RADIATION DETECTOR - According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, a detector, a first DAS, and a second DAS. The radiation detector includes a plurality of detection elements. Each detection element repeatedly detects X-rays generated by the X-ray tube and transmitted through a subject and repeatedly generates an electrical signal corresponding to the energy of the repeatedly detected X-rays. The first DAS acquires the electrical signal detected by part of the imaging region of each detection element in the integral mode. The second DAS acquires the electrical signal detected by the other part of the imaging region of each detection element in the photon count type mode.01-10-2013
20130010922X-RAY CT APPARATUS AND IMAGE PROCESSING METHOD - An X-ray CT apparatus has a scanner, a pre-scan control unit, an image generating unit, a region setting unit and a timing sensing unit. The pre-scan control unit controls an operation of the scanner to perform a pre-scan. The image generating unit generates image data of the object based upon the pre-scan. The region setting unit sets, on the basis of the image data, a region of interest, and a larger region encompassing the region of interest and a region around the region of interest and being used to determine whether or not a high pixel value region exists. The timing sensing unit senses, if the larger region does not include a pixel value higher than a first threshold, a timing to start a main scan, at which a pixel value of the region of interest exceeds a second threshold after injection of the contrast medium agent is started.01-10-2013
20130010918METHOD FOR DETERMINING SPATIAL DISTRIBUTION AND CONCENTRATION OF A COMPONENT IN A PORE VOLUME OF A POROUS MATERIAL - A water-soluble salt of a metal with a high atomic weight is selected as an X-ray contrast substance providing a selective ion-exchange reaction with a component. The salt has a general formula R01-10-2013
20120163532TOMOGRAPHIC RECONSTRUCTION OF AN OBJECT IN MOTION - A method for processing a sequence of a plurality of 2D projection images of an object of interest, acquired with a medical imaging system comprising a source of X-rays adapted to move around the object is provided. The method comprises obtaining 2D projection images of the object of interest according to a plurality of angulations at a first time when the object is without injection of a contrast product; obtaining 2D projection images of the object of interest according to a plurality of angulations at a second time when the object is opacified by injection of a contrast product iteratively treating the projection images by minimizing relative to a sequence of 3D images, wherein the minimizing solution is a set of estimated 3D images.06-28-2012
20100246757WIRELESS DIGITAL IMAGE DETECTOR - A digital detector of a digital imaging system is provided. In one embodiment, the digital detector includes a flat-panel detector having a detector array for converting X-ray radiation into image data. The digital detector may also include a plurality of antennas, and the digital detector may be configured to transmit the image data via one or more antennas of the plurality of antennas. Additional systems, methods, and devices are also disclosed.09-30-2010
20100246758X-RAY RADIATION DETECTOR FOR DETECTING IONIZING RADIATION, IN PARTICULAR FOR USE IN A CT SYSTEM - An X-ray radiation detector is disclosed for detecting ionizing radiation, in particular for use in a CT system, with a multiplicity of detector elements. In at least one embodiment, each detector element includes a semiconductor used as detector material with an upper side facing the radiation and a lower side facing away from the radiation, at least two electrodes, wherein one electrode is formed on the upper side of the semiconductor by a metallization layer, and the sum of all detector elements forms a base, which has a base normal at each point. In at least one embodiment, the invention is distinguished by the fact that the upper side of the semiconductor has a surface structure with a surface normal at each point, wherein the surface normal at least in part subtends an angle to the base normal. In at least one embodiment, the invention furthermore relates to a CT system provided with an X-ray radiation detector, which advantageously includes a multiplicity of detector elements structured according to at least one embodiment of the invention.09-30-2010
20120213328THREE-DIMENSIONAL SCANNER DATA COMPRESSION - One or more techniques and/or systems for compressing signals yielded from a CT examination are provided. The signals are encoded, or remapped, into a format in which the photon noise of the signals are substantially constant over a dynamic range while the signals are in a projection space domain. That is, the signals are encoded into a format in which the standard deviation of the photon noise does not change based upon the number of photons detected. Once remapped into such a format, the noise entropy of the signals may be set to a predetermined level (e.g., a minimum value that preserves the information in the signals). The signals may then be compressed using a compression technique. In one embodiment, the compression can reduce the amount of data comprised within the signals by a factor of 2.5 or more relative to an analog, linear formatted, signal that was generated by a pixel of the detector array.08-23-2012
20120134463RADIATION TUBE AND RADIATION IMAGING SYSTEM - An X-ray tube has a cathode, a rotating anode, and a case for enclosing the cathode and the rotating anode. The rotating anode generates X-rays due to emission of electron beams from the cathode. The case includes a vacuum envelope for enclosing the cathode and the rotating anode, and a housing for enclosing the vacuum envelope. Inside of the vacuum envelope is maintained vacuum. The vacuum envelope has an X-ray passing portion for passing the X-rays therethrough. The housing is provided with a radiation window for radiating the X-rays, passed through the X-ray passing portion, to the outside of the case. The radiation window includes an opening and a multi-slit arranged in the opening. The multi-slit partly shields the X-rays, generated by the rotating anode, to form a plurality of virtual linear light sources.05-31-2012
20090060124ENERGY RESOLVED COMPUTER TOMOGRAPHY - Interpolation of the momentum transfer prior to the filtered backprojection reconstruction in computer tomography baggage inspection or medical applications may not result in best image quality or minimal computational cost. According to an exemplary embodiment of the invention, a non-linear energy binning of an energy-resolved single-row detector is provided, which automatically leads to a Cartesian q-sampling on a parallel rebinned detector. This may avoid the q interpolation prior to the filtered back projection reconstruction, resulting in improved spatial resolution, reduction of computational effort and improved image quality.03-05-2009
20090003516X-Ct Scan System - An X-CT scan system includes a base, an object rotary support, an X-ray generation device and a data acquisition system, wherein one side of the detector is leveled to or beyond the prolong line of the connecting line between the X-ray source of the X-ray generation device and the center of the object rotary support, the length of the beyond portion is less than the radius of the imaging field. The advantage of the invention is in that the invention can reconstruct the entire image of the object by means of X-ray projection data which only covers half of the area of the object. Compared with the traditional CT scan system, half of the detector size can be saved at most. The X-CT scan system is simplified and the projection data amount for scan and computation amount for image reconstruction are also reduced with the reconstructed image quality guaranteed.01-01-2009
20120177173METHOD AND APPARATUS FOR REDUCING IMAGING ARTIFACTS - A method for reducing imaging artifacts includes preprocessing a computed tomography (CT) projection data set to generate preprocessed CT projection data, filtering the preprocessed CT projection data using a mean-preserving filter (MPF) to reduce electronic noise, generating a sinogram using the filtered CT projection data, performing a minus logarithmic operation on the sinogram to generate a noise corrected image, and displaying the noise corrected image on a display. A imaging correcting module and a multi-modality imaging system are also described herein.07-12-2012
20120257715X-RAY CT DETECTOR AND X-RAY CT APPARATUS - There are provided an X-ray detector, which can reduce the deformation of a collimator plate and can be easily processed and installed, and an X-ray CT apparatus using it. The X-ray detector includes a collimator plate, and a scintillator array, a photoelectric conversion element array and a substrate that are bonded in order from the X-ray incidence direction. The collimator plate is disposed such that one of a pair of opposite sides of the collimator plate is bonded to a lower support plate bonded on the scintillator array and the other side is bonded to an upper support plate and directions of the opposite sides are the same as a rotation axis direction of an X-ray CT apparatus in which the X-ray detector is provided.10-11-2012
20120257714X-RAY METHOD AND X-RAY SYSTEM FOR MERGING X-RAY IMAGES AND DETERMINING THREE-DIMENSIONAL VOLUME DATA - Three-dimensional image information is generated of a body part that is larger than the visual field of an X-ray machine. An X-ray source and an X-ray detector are disposed at a first position such that the X-ray source and the X-ray detector can record a first projection image of at least a first section of a body part. Then the first projection image is recorded. The X-ray source and the X-ray detector are next disposed at a second position such that the X-ray source and the X-ray detector can record a second projection image of at least a second section of the body part. The second section partially overlaps the first section. The first and second projection images are merged to form a projected image. A three-dimensional volume of the body part is reconstructed from the plurality of projection images.10-11-2012
20120257712APPARATUS AND A METHOD OF DETERMINING THE PROPORTIONS OF DIFFERENT POWDERS IN A POWDER - A method of determining the proportions of different powders in a powder comprises obtaining a sample of a powder, adding and mixing the sample into a molten material and freezing the mixture of powder and molten material to form a block. Computed tomography is performed on the block to produce a three-dimensional image of the block, the three-dimensional image of the block comprises a first shade, a second and a third shade corresponding to the material, a first powder particle and a sec and powder particle. The three-dimensional image of the block is analysed to count the number of regions exhibiting the second shade and the third shade corresponding to the number of first powder particles and second powder particles respectively. The fraction of second particles in the powder is determined by dividing the number of second powder particles by the sum of the number of first powder particles and the number of second powder particles.10-11-2012
20120230467RADIATION IMAGING APPARATUS AND IMAGING METHOD USING RADIATION - There is provided a panoramic imaging apparatus which serves as a radiation imaging apparatus. The panoramic imaging apparatus includes an X-ray tube radiating an X-ray as a radiation, a detector outputting digital-quantity frame data corresponding to an incident X-ray, and moving means moving the pair of X-ray tube and the detector relatively to an object. The apparatus further includes means for acquiring the frame data from the detector during movement of the X-ray tube and the detector, and means for optimally focusing a portion being imaged of the object using the acquired data and producing a three-dimensional optimally focused image in which the real size and shape of the portion being imaged are reflected.09-13-2012
20120236987MULTIPLE ENERGY CT SCANNER - A CT scanner for multiple energy CT scanning of a subject having an X-Ray source adapted to rotate about the subject; and a detector array, having a plurality of detector elements, adapted to acquire attenuation data for X-Rays that have been attenuated by a subject disposed between said X-Ray source and said detector array, said detector array comprising at least two types of detector element, which are differ by their spectral response. The scanner is adapted to generate images associated with the different X-Ray energy spectra.09-20-2012
20110038452IMAGE DOMAIN BASED NOISE REDUCTION FOR LOW DOSE COMPUTED TOMOGRAPHY FLUOROSCOPY - A method of computed-tomography and a computed-tomography apparatus in which x-ray projection data is acquired at a number of views for a scan of an object. Partial images are created from data for a desired number of said views. Full scan images are created from plural ones of the partial images. Non-overlapping time images are created from the full-scan images. Gradient images are also created. An improved image is created by weighting respective ones of the full scan and non-overlapping time images using the gradient image. The improved image has increased sharpness with reduced noise.02-17-2011
20100232568X-RAY OR GAMMA RAY DETECTOR ARRAY - An X-ray or gamma ray detector array is disclosed, with at least one row of detector elements including at least one layer made of an X-ray or gamma radiation absorbing conversion material. In at least one embodiment, the conversion material is at least in part composed of a chemical element with an atomic number ≧72, preferably >82. Such an X-ray or gamma ray detector array allows an increased spatial and spectral resolution and better dose usage.09-16-2010
20100232567X-RAY CT APPARATUS AND X-RAY DETECTING APPARATUS THEREOF - A high-resolution X-ray apparatus and a high-resolution X-ray detecting apparatus includes a plurality of multi-slice X-ray detection packs held on the pair of guide rails by detachable tight fitting members. A detachable pressing board is provided on the pair of guide rails for fixing the plurality of detection packs so that edges of adjacent detection packs contact each other.09-16-2010
20120087466X-ray Image Recording Method - The method includes using an angiography recording system to record a series of projection images of the organ or hollow organ of an examination object during a contrast-agent wash-in or wash-out process; using a CT recording system to record and reconstruct a 3D volume image of the organ or hollow organ of the examination object; at least partly superposing the series of projection images or image sections from the series of projection images on the 3D volume image; and displaying the 3D volume image on which the projection images are superposed.04-12-2012
20120087465MULTI-FACETED TILEABLE DETECTOR FOR VOLUMETRIC COMPUTED TOMOGRAPHY IMAGING - A system and method for CT image acquisition with increased slice acquisition and minimal image data degradation is provided. The system includes an x-ray projection source positioned that projects a cone beam of x-rays from a focal spot of the x-ray projection source toward an object and a plurality of detector modules positioned on the rotatable gantry to receive x-rays attenuated by the object. Each of the detector modules includes a module frame having a top surface that includes a plurality of facets formed thereon constructed so as to be oriented at differing angles relative to the focal spot and a plurality of sub-modules positioned on the plurality of facets to receive the x-rays attenuated by the object and to convert the x-rays to electrical signals, with each sub-module being oriented at an angle relative to the focal spot based on a respective facet on which the sub-module is mounted.04-12-2012
20120321036X-RAY CT SCANNER AND IMAGE PROCESSING APPARATUS - According to one embodiment, an X-ray CT scanner includes a gantry unit, a reconstruction unit, an extraction unit, and an output unit. The gantry unit includes an X-ray source and an X-ray detector and is configured to rotate the source and the detector. The reconstruction unit generates reconstruction image data by using data acquired by the detector. The extraction unit extracts, when using a predetermined phantom as the object, pixel values of pixels existing on a locus surrounding a tomographic image of the phantom contained in reconstruction image data generated by the reconstruction unit based on data acquired by the detector. The output unit outputs an extraction result obtained by the extraction unit or information obtained based on the extraction result.12-20-2012
20120328073DIGITAL INTEGRATION WITH DETECTOR CORRECTION - The present invention relates to systems and methods for reducing motion artifacts in x-ray sampling circuits. The detector system output is sampled at a rate than the x-ray exposure rate to reduce blurring associated with motion of the detector and/or object being scanned.12-27-2012
20120328072Hybrid Multi-Row Detector and Flat Panel Imaging System - A system and a method for acquiring image data of a subject with an imaging system are provided. The system can include a gantry that completely annularly encompasses at least a portion of the subject, and a source positioned within the gantry. The source can be responsive to a signal to output at least one pulse. The system can include a multi-row detector positioned within the gantry. The multi-row detector can be in alignment with the source and sets multi-row detector data based on the detected at least one signal. The system can include a flat panel detector positioned within the gantry. The flat panel detector can in alignment with the source and sets flat panel detector data based on the detected at least one signal. The system can include an image acquisition control module that determines which of the multi-row detector and the flat panel detector to use.12-27-2012
20130010920METHOD AND TOMOGRAPHY APPARATUS FOR RECONSTRUCTION OF A 3D VOLUME - A method for reconstruction of a 3D volume from a set of projection images recorded by a tomography apparatus using penetrating radiation in the field of dental medical applications takes into account a given value of at least one parameter. Simulated projection images are generated which correspond to at least a subset of the recorded projection images by simulating a projection of the penetrating radiation through the reconstructed 3D volume taking into account said given value of the at least one parameter. A re-projection error is determined by comparing the simulated projection images (with the corresponding recorded projection images. The re-projection error is then minimized by changing the value of the at least one parameter and by iterating over the above steps.01-10-2013
20130010919METHOD FOR DETERMINING SPATIAL DISTRIBUTION AND CONCENTRATION OF CLAY IN A CORE SAMPLE - A water-soluble salt of a metal with a high atomic weight is selected as an X-ray contrast substance providing a selective ion-exchange reaction with a clay. The salt has a general formula R01-10-2013
201101583812D REFLECTOR AND COLLIMATOR STRUCTURE AND METHOD OF MANUFACTURING THEREOF - A two dimensional collimator assembly and method of manufacturing thereof is disclosed. The collimator assembly includes a wall structure constructed to form a two dimensional array of channels to collimate x-rays. The wall structure further includes a first portion positioned proximate the object to be scanned and configured to absorb scattered x-rays and a second portion formed integrally with the first portion and extending out from the first portion away from the object to be scanned. The first portion of the wall structure has a height greater than a height of the second portion of the wall structure. The second portion of the wall structure includes a reflective material coated thereon in each of the channels forming the two dimensional array of channels.06-30-2011
20130022165X-RAY IMAGING APPARATUS AND METHOD - An X-ray imaging apparatus and method is provided. An X-ray imaging apparatus includes an X-ray radiation unit configured to radiate a first X-ray and a second X-ray onto a target along a predetermined path, an X-ray detection unit configured to detect the radiated first X-ray and the second X-ray that have passed through the target, and an image data generation unit configured to generate cross-section data that respectively corresponds to the detected first X-ray and the detected second X-ray and represents a predetermined cross-sectional layer of the target. The first X-ray is radiated at a location on the predetermined path that is different from a location on the predetermined path at which the second X-ray is radiated, the first X-ray including X-ray spectra that are different from X-ray spectra of the second X-ray.01-24-2013
20120243660Method For Correcting Detector Data Of An X-Ray Detector And X-Ray Recording System - In a method, with a current measurement, the history of the radiation exposure of the X-ray detector is taken into account with respect to the overall X-ray detector or subareas of the X-ray detector, in respect of a reduction in the measurement sensitivity produced as a result and a recovery of the reduction in the measurement sensitivity, and the determined measuring signal is corrected with a correction factor which is dependent on the history of the radiation exposure. Furthermore, an X-ray recording system includes a detector which includes a plurality of detector elements, which are read out in groups channel by channel and a read-out apparatus with computer-assisted device for correcting read-out detector data prior to a further processing of the detector data to form projective or tomographic images.09-27-2012
20080253510Computed Tomography System and Method - A computed tomography system having a fixed X-ray source [10-16-2008
20080253509Acquisition Parameter Optimization For Csct - Whereas the CT image can be acquired in a single revolution, the CSCT image acquisition may require several revolutions. According to an exemplary embodiment of the present invention, a CT/CSCT apparatus may be provided which uses CT data acquired during the first revolution to optimize acquisition parameters for the subsequent revolutions. Furthermore, projection data acquired with a pre-scanner may also be used for determining current modulation or setting an optimum voltage for the subsequent CSCT scan.10-16-2008
20080247507Rebinning for Computed Tomography Imaging - A tomographic apparatus includes a radiation source (10-09-2008
20080240342Advanced Csct Detector Shapes - The application of CSCT to baggage inspection necessitates a large field of view, resulting in a large gantry that has to sustain large centrifugal forces. Accordingly, various CSCT geometries are described which enable smaller gantry sizes. In particular, a CSCT scanner comprising a detector unit that is not focus-centred is described.10-02-2008
20080232544METHOD FOR SYNCHRONISING AN EMITTER AND A DETECTOR IN A COMPUTED TOMOGRAPHY SCANNER - In a computed tomography scanner provided with an emitter for emitting a beam of radiation through an object to be analysed and a detector for acquiring radiographies of the object, the detector generates a synchronisation signal corresponding to its state of activation for acquiring the radiographies, and the emitter is controlled via the synchronisation signal in such a way that the beam of radiation will be emitted when the detector is already activated.09-25-2008
20080226023X-RAY EXAMINATION METHOD AND X-RAY EXAMINATION APPARATUS - An X-ray examination apparatus includes a scanning X-ray source for outputting X-rays, a sensor base which is attached with a plurality of X-ray sensors and which rotates about a rotation axis, and an image acquiring control mechanism for controlling rotation angle of the sensor base and acquisition of image data from the X-ray sensors. With respect to each X-ray sensor, the scanning X-ray source moves the X-ray focal position of the X-ray source to each starting position of the X-ray emission set so that the X-ray transmits through a predetermined examination area of an examination target and enters each X-ray sensor, and emits the X-rays. The image control acquiring control mechanism acquires image data detected by the X-ray sensors, and a calculation unit reconstructs an image of the examination area based on the image data.09-18-2008
20130208852RADIOGRAPHIC SYSTEM AND CONTROL METHOD THEREOF - A detection field setting unit of a console sets a detection field of detection pixels of an electronic cassette which are used to detect the dose of X-rays passing through a subject so as to correspond to each irradiation position on the basis of irradiation positions of an X-ray source set by a driving condition setting unit and ROI information such as the position and the size of a region of interest (ROI) of the subject M input through an input device and the height thereof from a radiography platform. The electronic cassette performs an automatic exposure control of detecting the dose of X-rays by the use of the detection pixels in the detection field set by the detection field setting unit of the console and automatically controlling the irradiation dose of X-rays on the basis of the detected dose, when performing a radiographing operation at the irradiation positions.08-15-2013
20130094626X-RAY DIAGNOSTIC APPARATUS - According to one embodiment, an X-ray diagnostic apparatus includes an X-ray source, an X-ray detector, a rotating mechanism, a control unit, and a reconstruction unit. The source irradiates an object with X-rays. The detector outputs projection data by detecting X-rays transmitted through the object. The rotating mechanism rotates the source and the detector around the object. The control unit acquires projection data, while making the rotating mechanism rotate the source and the detector, such that the number of views in a specific view angle range becomes larger than that in other view angle ranges. The reconstruction unit configured to reconstruct an image by using acquired projection data of each view.04-18-2013
20130114786COARSE SEGMENTED DETECTOR ARCHITECTURE AND METHOD OF MAKING SAME - A CT system includes a rotatable gantry having an opening to receive an object to be scanned, the rotatable gantry having a detector mounting surface, an x-ray source attached to the gantry and configured to project an x-ray beam toward the object, a plurality of detector modules each mounted within one field-of-view (FOV) and mounted directly to the detector mounting surface of the rotatable gantry, a data acquisition system (DAS) configured to receive outputs from at least one of the plurality of detector modules, and a computer programmed to acquire projections of imaging data of the object from the DAS, and generate an image of the object using the imaging data.05-09-2013
20130101080METHOD AND SYSTEM FOR SUBSTANTIALLY REDUCING RING ARTIFACT BASED UPON RING STATISTICS - The current invention is generally related to an image processing method and system for substantially reducing ring artifacts. Using the attenuation data, the ring artifacts are substantially prevented based upon two-step process, and the second ring artifact reduction step removes the undesirable rings based upon previously determined statistical data including mean and standard deviation.04-25-2013
20130101082APPARATUS FOR GENERATING MULTI-ENERGY X-RAY IMAGES AND METHODS OF USING THE SAME - Apparatus for generating multi-energy x-ray images and systems and methods for processing and using multi-energy x-ray images are provided for treating a target, e.g., a tumor, for image-guided radiation therapy. An image-guided radiation therapy system is provided including a treatment delivery system, a multi-energy imaging system, and a system processor. The treatment delivery system includes a radiation source configured to generate treatment radiation beams. The multi-energy imaging system is configured to generate a first set of image data of the patient using imaging radiation at a first energy level and a second set of image data of the patient using imaging radiation at a second energy level. The system processor is configured to process the first and second sets of image data to generate an enhanced image of the patient and to direct the treatment delivery system based on information obtained from the enhanced image.04-25-2013
20080205587X-RAY CT DEVICE AND METHOD OF CONTROLLING THE SAME - An X-ray CT device generates an X-ray beam in the shape of a cone along the body axis of a subject from an X-ray tube to the subject and detects the X-rays that pass the subject by a two-dimensional detection system during a linear track scan. In addition, the X-ray CT device detects X-rays from a relative rotation movement of the X-ray tube and the subject during the linear track scan under the same condition. A reconstruction device reconstructs an image by back projection of the data of the subject based on the X-rays detected in the two scans.08-28-2008
20110211667DE-POPULATED DETECTOR FOR COMPUTED TOMOGRAPHY AND METHOD OF MAKING SAME - A system, method, and apparatus includes a computed tomography (CT) detector array having a central region with a plurality of central region detecting cells configured to acquire CT data of a first number of slices during a scan, a first wing along a first side of the central region, and a second wing along a second side of the central region opposite the first side. The first wing includes a plurality of first wing detecting cells configured to acquire CT data of a second number of slices during the scan. The second wing includes a plurality of second wing detecting cells configured to acquire CT data of a third number of slices during the scan. The second and third number of slices are less than the first number of slices. The first wing detecting cells are of a different type than the central region detecting cells.09-01-2011
20110222649X-RAY CT APPARATUS AND CONTROL METHOD FOR X-RAY CT APPARATUS - An X-ray CT apparatus has an X-ray source, an X-ray detector, a temperature sensor, a data acquisition unit and a controller. The X-ray source generates an X-ray. The X-ray detector detects the X-ray. The temperature sensor detects a temperature of the X-ray detector. The data acquisition unit acquires data from the X-ray detector. The controller controls a temperature of the X-ray detector through adjustment of a workload of the data acquisition unit during a non-scanning time.09-15-2011
20080198965Method for producing tomographic pictures with the aid of an X-ray computed tomography system with scattered radiation correction - A method is disclosed for producing tomographic pictures with the aid of an X-ray CT system including at least two X-ray sources arranged on a gantry with an angular offset to scan an examination object. In at least one embodiment of the method, in order to determine the scattered radiation distribution, pre-scanning is carried out in which the X-ray sources rotate about the examination object and the dose rate is modulated as a function of the rotation angle, no radiation dose is output over the majority of the revolution, at specific pre-scan angles a dose rate is produced briefly and individually in each case by the X-ray sources of the focus/detector systems, and the received scattered radiation is measured simultaneously by the detectors of the at least one other focus/detector system. Moreover, at least one embodiment of the invention also relates to an X-ray CT system having at least two focus/detector systems and an arithmetic and control unit with a memory for program code that carries out during operation the method steps being stored.08-21-2008
20100034344X-RAY COMPUTED TOMOGRAPHY APPARATUS - An X-ray computed tomography apparatus includes an X-ray tube (02-11-2010
20130148777VARIABLE PITCH COLLIMATOR AND METHOD OF MAKING SAME - An x-ray detector assembly includes a curved rail and a first plurality of x-ray attenuation plates attached to the curved rail, wherein the plates of the first plurality of x-ray attenuation plates are spaced apart from one another by a first pitch. A second plurality of x-ray attenuation plates are attached to the curved rail, wherein the plates of the second plurality of x-ray attenuation plates are spaced apart from the plates of the first plurality of x-ray attenuation plates by a second pitch greater than the first pitch. A first plurality of x-ray detector cells is also positioned adjacently to the first and second pluralities of x-ray attenuation plates and positioned in a linear arrangement with respect to each other.06-13-2013
20120275561METHODS AND APPARATUS FOR CT SMOOTHING TO REDUCE ARTIFACTS - A method for reconstructing an image of an object includes scanning an object using a computed tomographic (CT) imaging apparatus to acquire projections of the object. A set of thresholds are determined utilizing the projections, and selected smoothing kernels are associated with the thresholds. The method further includes utilizing the smoothing kernels and the projections to produce smoothed projections in accordance with the thresholds and filtering and backprojecting the smoothed projections to generate an image of the object.11-01-2012
20120257713Non-Destructive Analysis of an Object - A computed tomography (CT) scanning system performs non-destructive analysis of an object. The CT scanning system generates a series of two-dimensional images of the object from different angles as the object rotates. The CT scanning system uses the generated two-dimensional images to reconstruct three-dimensional images of the object. By displaying several reconstructed three-dimensional images over time, the CT scanning system generates a four-dimensional representation of the object.10-11-2012
20100296625RADIATION DETECTOR COMPRISING A LIGHT REFLECTIVE MATERIAL - The invention relates to a light-reflecting material (11-25-2010
20100316185SOLID IMAGING DEVICE AND X-RAY CT DEVICE INCLUDING THE SOLID IMAGING DEVICE - The present invention relates to a solid-state imaging device, etc. having a structure for capturing a high-resolution image even when any row selecting wiring is disconnected. The solid-state imaging device (12-16-2010
20100316184SILICON PHOTOMULTIPLIER DETECTOR FOR COMPUTED TOMOGRAPHY - An x-ray detector module including a silicon photomultiplier and a computed tomography imaging system including the same is provided. The x-ray detector module includes optically coupled scintillation materials and silicon photomultiplier pixels. The x-ray detector pixels may have a constant axial profile with a polygonal cross section, which may be rectangular. A plurality of the x-ray detector pixels are generally arranged into 2D arrays. Each x-ray detector pixel may be connected to a dedicated electronic readout channel. In operation, the scintillation materials interact with incident x-ray photons to generate visible-light photons. The silicon photomultiplier pixels generate electrical signals in accordance with the number of visible-light photons generated by an incident x-ray photon. The electronic readout channels process the electrical signals to determine characteristics of the incident x-ray photons. Information of a plurality of x-ray photons are compiled to generate computed tomography images.12-16-2010
20110311023X-RAY COMPUTED TOMOGRAPHY APPARATUS - An X-ray CT apparatus includes an X-ray source configured to generate an X-ray; a scintillator configured to convert the X-ray into a fluorescent; a substrate including a plurality of photosensitive elements configured to convert the fluorescent into an electric charge; a temperature sensor formed on the surface of the substrate; a heat element formed on the surface of the substrate; and a controller configured to control a temperature of the photodiode by adjusting an electric current of the heat element.12-22-2011
20110311022Counting Detector And Computed Tomography System - A counting detector is disclosed. In at least one embodiment, the counting detector includes sensors for converting radiation quanta into electrical pulses and an evaluation unit with a number of energy thresholds, wherein the evaluation unit generates for each sensor a count value for each energy threshold from the pulses, which count value represents the number of radiation quanta with an energy above the respective energy threshold. In at least one embodiment, one of the energy thresholds is arranged directly above a characteristic energy of radiation quanta causing double counting in order to correct double counting; and a correction unit calculates a corrected count value from the count values of the energy thresholds, which corrected count value has reduced double counting for at least one of the energy thresholds. Images with an improved contrast-to-noise ratio and, at the same time, a reduced X-ray dose can be generated on the basis of the at least one corrected count value. In at least one embodiment, the invention moreover relates to a computed tomography system with such a counting detector.12-22-2011
20110311021MEDICAL IMAGE DISPLAY APPARATUS AND X-RAY COMPUTED TOMOGRAPHY APPARATUS - According to one embodiment, a medical image display apparatus includes a thin-out processing unit configured to execute thin-out processing for a series of original medical images, a display unit configured to display the series of medical images generated by the thin-out processing as a moving image and a control unit. The control unit controls the thin-out processing unit to change thin-out ratios on a time axis in the thin-out processing.12-22-2011
20120027166RADIATION IMAGE CAPTURING APPARATUS - A radiation image capturing apparatus includes an overlapping area specifying unit which acquires a plurality of radiation images of the plurality of image capturing ranges of an elongate test subject in advance, specifies overlapping areas in the radiation images, and registers information of the specified overlapping areas in an information table, an image joining unit which acquires a plurality of radiation images of the plurality of image capturing ranges of the elongate subject, and joins the acquired plurality of radiation images based on the information of the overlapping areas registered in the information table to generate a single joined radiation image, and an image generating unit for generating a tomographic image on an arbitrary image plane based on the joined radiation image.02-02-2012
20120033783X-RAY COMPUTED TOMOGRAPHY APPARATUS AND X-RAY DIAGNOSTIC APPARATUS - According to one embodiment, in an X-ray computed tomography apparatus including a gantry unit including an X-ray tube and an X-ray detector, a bed unit, and a console, the X-ray computed tomography apparatus includes a storage unit, a power supply unit, and a power supply control unit. The storage unit stores examination schedule data of the X-ray computed tomography. The power supply unit selectively operates between an active mode of supplying power to at least one of the gantry unit, the bed unit, and the console and a standby mode of stopping supplying power to at least one of the bed unit and the gantry unit and supplying, to the console, power smaller than power supplied in the active mode. The power supply control unit controls switching from the active mode to the standby mode based on the examination schedule data.02-09-2012
20120057670MULTI-DETECTOR ARRAY IMAGING SYSTEM - An imaging system (03-08-2012
20130202079System and Method for Controlling Radiation Dose for Radiological Applications - A system and method for reconstructing an image acquired by delivering an irradiating dose of radiation to a subject includes acquiring imaging data using a dose of irradiating radiation and selecting at least one of a plurality of mechanisms for reducing the dose that could be delivered to the subject to acquire additional imaging data. Noise is inserted into the imaging data to simulate the at least one of the plurality of mechanisms for reducing the dose that could be applied to acquire the additional imaging data to thereby generate simulated imaging data at a reduced dose of irradiating radiation. A simulated reduced dose image is reconstructed from the simulated imaging data. A method is provided for utilizing a non-local means filter adapted using a map of local noise to produce denoised medical imaging data reflecting reduced local nose levels from those in originally-acquired medical imaging data.08-08-2013
20130202080System and Method for Denoising Medical Images Adaptive to Local Noise - A system and method is provided for estimating the local noise of CT images and denoising the images using a modified non-local means (NLM) algorithm that is adaptive to local variations of noise levels. A strategy for efficiently estimating the local noise of CT images is also described.08-08-2013
20120300900DENTAL COMPUTED TOMOGRAPHY APPARATUS - The invention relates to a dental computed tomography 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 from different directions and at least one laser or a corresponding lighting arrangement, which is fitted to direct a light pattern at different locations on the face of a patient positioned at the imaging station, and a means arranged into functional connection with said at least one colour camera for creating a virtual three-dimensional surface model from the light-pattern information directed at different locations on the face of the patient positioned at the imaging station, and a means for combining said face image information detected by said at least colour camera to said surface model of the patient's face to create a virtual three-dimensional texture model of the patient's face.11-29-2012
20120093284X-RAY PHOTOGRAPHING DEVICE - An X-ray photographing device (04-19-2012
20120093283METHOD FOR PLACING A/D CONVERTER, FRONT-LIT DETECTOR AND CT APPARATUS - A front-lit detector includes a collimator, an X-ray to visible light converter configured to convert X-rays to visible light after the X-rays pass through the collimator to irradiate the X-ray to visible light converter, a visible light to analog signal converter configured to cover the visible light into analog signals, a substrate on which the visible light to analog signal converter is placed, and an A/D converter configured to convert the analog signals into digital signals.04-19-2012
20130208853X-RAY DIAGNOSTIC SYSTEM AND X-RAY DIAGNOSTIC METHOD - An X-ray diagnostic system according to an embodiment includes: an X-ray tube for radiating an X-ray to the subject on the basis of a tube current for taking a scanogram of a subject; an X-ray detector for detecting the X-ray radiated by the X-ray tube and transmitted through the subject; a data collector for collecting X-ray dose distribution data, which shows the dose distribution of the X-ray; an image processor for creating the scanogram from the X-ray dose distribution data; a genuine data generator for generating genuine data showing the dose distribution of the X-ray, from the scanogram; a threshold value setting section for setting a threshold value for the genuine data; and a tube current adjustor for adjusting a tube current for taking a tomographic image of the subject in accordance with a comparison between the X-ray dose in the genuine data and the threshold value.08-15-2013
20130208854COMPUTED TOMOGRAPHY DEVICE AND METHOD FOR OPERATING A COMPUTED TOMOGRAPHY DEVICE - A method is disclosed for operating a computed tomography device including an x-ray source embodied to emit a fan-type beam bundle and a detector arrangement interacting therewith and including a plurality of detector elements. An embodiment of the method provides that an integration time provided to read out a detector element is dependent on the position of the detector element within the detector arrangement, wherein with a detector element which detects x-rays which penetrate the isocenter lying between the c-ray source and the detector arrangement, a longer integration time is provided, than with a detector element which detects x-rays which penetrate an examination volume which is further away from the isocenter.08-15-2013
20130208855MEDICAL IMAGE DIAGNOSTIC APPARATUS - Provided is a medical image diagnostic apparatus, including: an internal image acquiring unit for acquiring a plurality of internal images different in time phase by irradiating a body part of a subject with X-rays; an outer appearance image acquiring unit for acquiring an outer appearance image by photographing the body part of the subject; an analysis unit for analyzing the outer appearance image to acquire first shape information indicating a shape of the body part of the subject and analyzing each of the plurality of internal images to acquire second shape information indicating a shape of the body part of the subject; and a display control unit for displaying the outer appearance image and the each of the plurality of internal images by superimposing one on another so that the body part of the subject included in the outer appearance image and the body part of the subject included in the each of the plurality of internal images are located in the same position based on the first shape information and the second shape information.08-15-2013

Patent applications in class Beam detection system