Patent application number | Description | Published |
20080242960 | Spatially Resolved Oxymetry - In optical tomography, a calibration of the data may be necessary for image reconstruction. According to an exemplary embodiment of the present invention, the object of interest is used for calibration, wherein the image data is acquired during a highly oxygenated phase of the object of interest and wherein the calibration data is acquired during a low oxygenated phase of the object of interest. This may provide for an improved calibration, resulting in improved image quality. | 10-02-2008 |
20080253502 | Method and Device for the Iterative Reconstruction of Cardiac Images - The invention relates to a method and a device for the iterative reconstruction of cross-sectional images of the heart ( | 10-16-2008 |
20080267344 | Signal Processing Unit for Producing Images - An exemplary embodiment of the invention provides a signal processing unit for producing images of an object under examination based on data signals of a tomography system, the signal processing unit comprising a processor and an input interface, wherein the input interface is adapted to receive measured data signals. Furthermore, the processor is adapted to generate a pulmonary gating signal based on said measured data signals and is further adapted to generate an image based on said measured data signals by using the pulmonary gating signal. | 10-30-2008 |
20080267455 | Method for Movement Compensation of Image Data - According to an exemplary embodiment a method for movement compensation of image data of an object of interest comprises receiving projection data, receiving motion vector field data, and dividing the motion vector field data into a number of layers of motion vector field data. Furthermore, the method comprises generating motion compensated projection data by projecting at least one of the number of layered motion vector field data onto the projection data and applying a two dimensional motion compensation on the projection, and generating image data of at least one voxel by back-projecting the movement compensated projection data. | 10-30-2008 |
20080273655 | Imaging 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 |
20090060124 | ENERGY 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 |
20090153850 | OPTICAL FLUORESCENCE TOMOGRAPHY CALIBRATION - The invention relates to a device for imaging an interior of a turbid medium and a medical image acquisition device comprising: a) a measurement volume ( | 06-18-2009 |
20090208077 | IMAGING SYSTEM - The present invention relates to an imaging system for imaging a field of interest, in particular to a computed tomography system. The imaging system comprises an irradiation unit ( | 08-20-2009 |
20090262885 | CONE BEAM COMPUTED TOMOGRAPHY WITH MULTIPLE PARTIAL SCANNING TRAJECTORIES - A computer tomography apparatus ( | 10-22-2009 |
20090268863 | RECONSTRUCTION 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 |
20090274265 | CONTINUOUS COMPUTER TOMOGRAPHY PERFORMING SUPER-SHORT-SCANS AND STRONGER WEIGHTING OF MOST RECENT DATA - A computer tomography apparatus and method, a computer-readable medium and a program element are provided for examining a region of interest (ROI) of an object or patient in real-time. When only a region of interest is to be reconstructed, it is sufficient to rotate the radiation source and detector elements such that they cover a circular arc whose extension is less than π+α, α being the beam angle of the radiation source. This scanning range is called super-short-scan. Super-short-scans produce less data. Consequently image reconstruction is quicker which is very preferable for real-time CT. The CT data can furthermore be weighted in a manner that data detected at the end of a super-short-scan are weighted stronger than data detected at the beginning of a super-short-scan. | 11-05-2009 |
20090310737 | METHOD FOR COMPUTER TOMOGRAPHY, AND COMPUTER TOMOGRAPH - According to the invention, there is provided a method of recording images of the heart in computer tomography, in which, in order to prevent movement artifacts, the images are reconstructed on the basis of similar movement states of the heart and different radiation intensities are used for different movement states. Also provided is a computer tomograph for recording images of the heart in computer tomography by means of time windows which exhibit similar movement states of the heart in order to prevent movement artifacts, said computer tomograph comprising a control device which controls a radiation source with different radiation intensities for different movement states. Furthermore provided is a computer program for a computer tomograph for recording images of the heart in computer tomography by means of time windows which exhibit similar movement states of the heart in order to prevent movement artifacts, and for controlling a radiation source with different radiation intensities for different movement states. | 12-17-2009 |
20090326382 | OPTICAL IMAGING SYSTEM AND METHOD - A device for determining a concentration-related quantity of a fluorescent contrast agent applied to an object ( | 12-31-2009 |
20100030084 | DIFFUSE OPTICAL TOMOGRAPHY WITH MARKERS CONTAINING FLUORESCENT MATERIAL - The invention relates to a system, a medical image acquisition system, and a method for imaging an interior of a turbid medium ( | 02-04-2010 |
20100061506 | RADIATION-AND-DETECTION SYSTEM - The invention relates to radiation-and-detection system comprising a radiation unit ( | 03-11-2010 |
20100104149 | IMAGING OF A TURBID MEDIUM - An imaging system for imaging a turbid medium comprises a radiation source to illuminate an object to be imaged. A detection system to detect radiation from the object to produce a plurality of detected radiation levels at respective positions relative to the object. A distinction is made between (i) a central radiation component having passed mainly through an inner region of the object and (ii) a boundary radiation component having passed mainly through a boundary region of the object. On the basis of a comparison of the central radiation component and the boundary radiation component the optical properties, notably optical scattering and optical absorption are derived. From the detected radiation from the object and the optical properties an image of the interior or the object is reconstructed. | 04-29-2010 |
20100166139 | EFFECTIVE DUAL-ENERGY X-RAY ATTENUATION MEASUREMENT - It is described a method and a CT system for measuring dual-energy X- ray attenuation data of an object. The CT system comprises a rotatable holder, an X-ray source comprising two different X-ray focus points, and an X-ray detection device comprising a plurality of detector elements exhibiting different spectral sensitivities. The method comprises the steps of (a) adjusting the X-ray source such that it emits X-rays originating a first focus point, (b) acquiring first attenuation data separately with first detector elements and with second detector elements, (c) moving the X-ray focus discretely to a second focus point, and (d) acquiring second attenuation data separately with both types of detector elements. Thereby the two focus points are spatially separated from each such that a first beam path originating from the first focus point penetrates a certain voxel within the object and impinges on a first detector element and a second beam path originating from the second X-ray focus point penetrates the same voxel and impinges on a second detector element. | 07-01-2010 |
20100189331 | APPARATUS FOR DETERMINING A HIGH DENSITY REGION IN AN IMAGE - The invention relates to an apparatus for determining a high density region in an image, wherein the apparatus comprises a provision unit ( | 07-29-2010 |
20100238441 | DEVICE FOR IMAGING THE INTERIOR OF AN OPTICALLY TURBID MEDIUM AND RECEPTACLE UNIT FOR SUCH A DEVICE | 09-23-2010 |
20100239188 | IMAGING SYSTEM, IMAGING METHOD AND COMPUTER PROGRAM FOR IMAGING A REGION OF INTEREST - The present invention relates to an imaging system for imaging a region of interest comprising an illumination unit and a detection unit. The imaging system further comprises a grouping unit for grouping the detection values, wherein each group comprises at least one alpha detection value and at least one beta detection value ( | 09-23-2010 |
20100272230 | DETECTION SETUP FOR X-RAY PHASE CONTRAST IMAGING - The invention relates to a method and a device for generating phase contrast X-ray images of an object ( | 10-28-2010 |
20100272322 | CORRECTION FOR UN-VOLUNTARY RESPIRATORY MOTION IN CARDIAC CT - A CT angiography apparatus ( | 10-28-2010 |
20100278409 | HARDWARE TUMOR PHANTOM FOR IMPROVED COMPUTER-AIDED DIAGNOSIS - An imaging system ( | 11-04-2010 |
20100296624 | HIGH-FREQUENCY SADDLE-TRAJECTORY FOR AXIAL CARDIAC CT - If, in cardiac CT, the time window becomes shorter than the time required for a complete rotation of the gantry, the volume that can be reconstructed becomes small due to the non-existence of related pi-lines. According to an exemplary embodiment of the present invention, an examination apparatus is provided which generates a radiation beam oscillating in z-direction with an oscillation frequency higher than the rotational frequency of the source. This may provide for an exact image reconstruction of large volumes. | 11-25-2010 |
20100303381 | IMAGING SYSTEM AND IMAGING METHOD FOR IMAGING A REGION OF INTEREST - The invention relates to an imaging system for imaging a region of interest, in particular to a computed tomography system. First data for generating an image of the region of interest are provided, which are used by a reconstruction unit ( | 12-02-2010 |
20100322514 | APPARATUS, METHOD AND COMPUTER PROGRAM FOR PRODUCING A CORRECTED IMAGE OF A REGION OF INTEREST FROM ACQUIRED PROJECTION DATA - The present invention relates to an apparatus for producing a corrected image of a region of interest from acquired projection data ( | 12-23-2010 |
20110038516 | UNCERTAINTY MAPS FOR SEGMENTATION IN THE PRESENCE OF METAL ARTIFACTS - When performing model-based segmentation on a 3D patient image ( | 02-17-2011 |
20110095197 | IMAGING APPARATUS FOR GENERATING AN IMAGE OF A REGION OF INTEREST - The present invention relates to an imaging apparatus for generating an image of a region of interest. The imaging apparatus comprises a radiation source ( | 04-28-2011 |
20110142250 | GRADIENT COIL NOISE MASKING FOR MPI DEVICE - When subjecting a patient to an MRI scan, noise generated by gradient coils in an MRI device is beautified by playing a complementary musical piece that matches the gradient coil noise in one or both of tempo and musical key. Complementary musical pieces (e.g., songs, tunes, melodies, etc.) are pre-generated for specific gradient coil sequences. Upon selection of one or more sequences to be executed during an MR scan, complementary musical pieces for the selected sequence(s) are identified and played back to a patient in the bore of the MRI device during the scan to alleviate patient stress. Tempo and/or musical key of the complementary musical pieces is adjustable (a priori or in real time) to synchronize the complementary musical piece(s) to a specific gradient sequence both rhythmically and harmonically. | 06-16-2011 |
20110150176 | IMAGE PROCESSING WITH COMPUTER AIDED DETECTION AND/OR DIAGNOSIS - The invention relates to a method and an image processing device ( | 06-23-2011 |
20110182400 | METHOD AND APPARATUS TO IMPROVE CT IMAGE ACQUISITION USING A DISPLACED GEOMETRY - A method and apparatus are provided to improve CT image acquisition using a displaced acquisition geometry. A CT apparatus may be used having a source ( | 07-28-2011 |
20110311024 | INTERFACE DEVICE, IMAGING SYSTEM AND METHOD FOR RIM-IMAGING - The invention relates to imaging systems in which during imaging of an object a matching medium is used to match the object to its surroundings. An interface device is used for phase contrast rim-imaging of the object, which comprises a compartment in which a deformable matching material is contained which can be pushed to the side when the object to be imaged is compressed. Thus, a lateral field of view for X-ray phase contrast mammography may be increased. | 12-22-2011 |
20120008747 | DIFFERENTIAL PHASE-CONTRAST IMAGING WITH CIRCULAR GRATINGS - The invention relates to an X-ray differential phase-contrast imaging system which has three circular gratings. The circular gratings are aligned with the optical axis of the radiation beam and a phase stepping is performed along the optical axis with the focal spot, the phase grating and/or the absorber grating. The signal measured is the phase-gradient in radial direction away from the optical axis. | 01-12-2012 |
20120020461 | ACHROMATIC PHASE-CONTRAST IMAGING - An achromatic phase-contrast imaging apparatus for examining an object of interest is provided which comprises two different phase gratings which have different pitches. Thus, the imaging apparatus yields phase-contrast information for two different energies. Thus, phase-information over a wider energy band can be used. | 01-26-2012 |
20120057676 | GRATING FOR PHASE-CONTRAST IMAGING - The invention relates to gratings for X-ray differential phase-contrast imaging, a focus detector arrangement and X-ray system for generating phase-contrast images of an object and a method of phase-contrast imaging for examining an object of interest. In order to provide gratings with a high aspect ratio but low costs, a grating for X-ray differential phase-contrast imaging is proposed, comprising a first sub-grating ( | 03-08-2012 |
20120057677 | TILTED GRATINGS AND METHOD FOR PRODUCTION OF TILTED GRATINGS - The present invention relates to phase-contrast imaging which visualizes the phase information of coherent radiation passing a scanned object. Focused gratings are used which reduce the creation of trapezoid profile in a projection with a particular angle to the optical axis. A laser supported method is used in combination with a dedicating etching process for creating such focused grating structures. | 03-08-2012 |
20120141006 | RECONSTRUCTION OF A REGION-OF-INTEREST IMAGE - A method and system to perform region-of-interest (ROI) reconstruction is provided, even if the original projection data are truncated. The reconstruction is performed on a superset of the ROI, including the ROI as well as other areas which are outside the scan field-of-view of the imaging system but still within the imaging bore. | 06-07-2012 |
20120148136 | APPARATUS AND METHOD FOR PROCESSING PROJECTION DATA - The invention relates to a projection values processing apparatus ( | 06-14-2012 |
20120177274 | SYSTEM AND METHOD FOR GENERATING AN IMAGE OF A REGION OF INTEREST - The invention relates to an image generation system for generating an image of a region of interest. The image generation system comprises a measured data providing unit for providing measured data of the region of interest, a reconstruction unit ( | 07-12-2012 |
20120236992 | SCANNING SYSTEM FOR DIFFERENTIAL PHASE CONTRAST IMAGING - The invention relates to the field of X-ray differential phase contrast imaging. For scanning large objects and for an improved contrast to noise ration, an X-ray device ( | 09-20-2012 |
20120237097 | MOTION COMPENSATION WITH TISSUE DENSITY RETENTION - A method includes reconstructing the projection data based on a reconstruction algorithm that compensates for both motion and tissue density changes of the moving organ across different motion phases, thereby generating motion and density compensated image data. A data compensator includes a reconstructor that reconstructs motion compensated image data based on an reconstruction algorithm that compensates for tissue density changes in a moving object. | 09-20-2012 |
20120243658 | PHASE CONTRAST IMAGING - X-ray devices for Phase Contrast Imaging (PCI) are often built up with the help of gratings. For large field-of-views (FOV), production cost and complexity of these gratings could increase significantly as they need to have a focused geometry. Instead of a pure PCI with a large FOV, this invention suggests to combine a traditional absorption X-ray-imaging system with large-FOV with an insertable low-cost PCI system with small-FOV, The invention supports the user to direct the PCI system with reduced FOV to a region that he regards as most interesting for performing a PCI scan thus eliminating X-ray dose exposure for scanning regions not interesting for a radiologist. The PCI scan may be generated on the basis of local tomography. | 09-27-2012 |
20120250821 | COMPUTED TOMOGRAPHY APPARATUS - The invention relates to a computed tomography apparatus for imaging an object. The computed tomography apparatus comprises a radiation source ( | 10-04-2012 |
20120250823 | CALIBRATION OF DIFFERENTIAL PHASE-CONTRAST IMAGING SYSTEMS - The present invention relates to an X-ray imaging system and a method for differential phase—contrast imaging of an object. To improve calibration of differential phase—contrast imaging systems and the alignment of the gratings an X-ray imaging system is provided that comprises an X-ray emitting arrangement providing at least partially coherent X-ray radiation and an X-ray detection arrangement comprising a phase-shift diffraction grating, a phase analyzer grating, and an X-ray image detector, all arranged along an optical axis. For stepping, the gratings and/or the X-ray emitting arrangement are provided with at least two actuators arranged opposite to each other with reference to the optical axis. For calibration, calibration projections are acquired without an object, wherein, the emitted X-ray radiation or one of the gratings is stepwise displaced with a calibration displacement value. For examination, measurement projections are acquired with an object, wherein the emitted X-ray radiation or one of the gratings is stepwise displaced with a measurement, a calibration projection is associated to each of the measurement projections by registering the latter with the calibration projections. | 10-04-2012 |
20120294414 | COMPUTED TOMOGRAPHY APPARATUS - The invention relates to a computed tomography apparatus comprising a radiation source ( | 11-22-2012 |
20120307966 | APPARATUS FOR PHASE-CONTRAST IMAGING COMPRISING A DISPLACEABLE X-RAY DETECTOR ELEMENT AND METHOD - The present invention relates to X-ray image acquisition technology in general. Employing phase-contrast imaging for X-ray image acquisition may significantly enhance the quality and information content of images acquired. However, phase-contrast information may only be obtainable in a small detector region, possibly being too small for a sufficient field of rotation view for specialized X-ray imaging applications. Accordingly, an apparatus for phase-contrast imaging is provided that may allow the acquisition of an enlarged field of view. According to the present invention an apparatus ( | 12-06-2012 |
20130064469 | EDGE-PRESERVING NOISE FILTERING - The invention relates to an image processing apparatus ( | 03-14-2013 |
20130156284 | REGULARIZED PHASE RETRIEVAL IN DIFFERENTIAL PHASE-CONTRAST IMAGING - The present invention relates to differential phase-contrast imaging of an object ( | 06-20-2013 |
20130170618 | DIFFERENTIAL PHASE-CONTRAST IMAGING WITH IMPROVED SAMPLING - The present invention relates to differential phase-contrast imaging of an object. For increasing spatial resolution of an X-ray imaging system ( | 07-04-2013 |
20130202166 | APPARATUS AND METHOD FOR HYBRID RECONSTRUCTION OF AN OBJECT FROM PROJECTION DATA - The invention relates to an imaging apparatus for imaging an object of interest. An analytical reconstruction unit ( | 08-08-2013 |
20130236079 | METHOD AND DEVICE FOR ANALYSING A REGION OF INTEREST IN AN OBJECT USING X-RAYS - A method and a device for analyzing a region of interest in an object is proposed. The method comprises: (a) providing measurement data by a differential phase contrast X-ray imaging system, and (b) analyzing characteristics of the object in the region of interest. Therein, the measurement data comprise a 2-dimensional or 3-dimensional set of pixels wherein for each pixel the measurement data comprises three types of image data spatially aligned with each other, including (i) absorption representing image data A, (ii) differential phase contrast representing image data D, and (iii) coherence representing image data C. The analyzing step is based, for each pixel, on a combination of at least two of information comprised in the absorption representing image data A and information comprised in the differential phase contrast representing image data D and information comprised in the coherence representing image data C. | 09-12-2013 |
20130243297 | FORWARD PROJECTION APPARATUS - The invention relates to a forward projection apparatus for performing a forward projection through an image ( | 09-19-2013 |
20130251286 | ITERATIVE RECONSTRUCTION ALGORITHM WITH A CONSTANT VARIANCE BASED WEIGHTING FACTOR - A method includes reconstructing measured projection data using an iterative statistical reconstruction algorithm that reduces image artifact caused by differences in variances in projections of the measured projection data used to update a voxel of the image for one or more voxels of the image. A reconstructor includes a processor that reconstructs measured projection data using an iterative statistical reconstruction algorithm that reduces or mitigates image artifact caused by differences in variances in projections used to update a voxel of the image for one or more voxels of the image. A computer readable storage medium encoded with computer executable instructions, which, when executed by a processor of a computer, cause the processor to: reduce image artifact caused by differences in variances in projections used to update a voxel of an image for one or more voxels of the image using an iterative statistical reconstruction algorithm. | 09-26-2013 |
20130259191 | POST-PATIENT DYNAMIC FILTER FOR COMPUTED TOMOGRAPHY (CT) - An imaging system includes a radiation source ( | 10-03-2013 |
20130279778 | IMAGING SYSTEM FOR IMAGING AN OBJECT - The invention relates to an imaging system for imaging an object. Projection data of the object are acquired by using a radiation source emitting primary radiation ( | 10-24-2013 |
20130279785 | IMAGING SYSTEM FOR IMAGING A REGION OF INTEREST - The noise of a detection value acquired by an imaging system ( | 10-24-2013 |
20130287279 | DUAL-ENERGY TOMOGRAPHIC IMAGING SYSTEM - The invention relates to an imaging system ( | 10-31-2013 |
20130308751 | DIFFERENTIAL PHASE-CONTRAST IMAGING WITH INCREASED DYNAMIC RANGE - The present invention relates to X-ray differential phase-contrast imaging. In order to enhance the information acquired by phase-contrast imaging, an analyzer grating ( | 11-21-2013 |
20130315373 | DIFFERENTIAL PHASE-CONTRAST IMAGING WITH FOCUSSING DEFLECTION STRUCTURE PLATES - The present invention relates to X-ray differential phase-contrast imaging, in particular to a deflection device for X-ray differential phase-contrast imaging. In order to provide differential phase-contrast imaging with improved dose efficiency, a deflection device ( | 11-28-2013 |
20130329851 | DETECTION APPARATUS - The invention relates to a detection apparatus comprising a filter ( | 12-12-2013 |
20140153809 | IMAGE GENERATION APPARATUS - The invention relates to an image generation apparatus for generating an image of an object. An image providing unit ( | 06-05-2014 |
20140169653 | FREQUENCY DEPENDENT COMBINATION OF X-RAY IMAGES OF DIFFERENT MODALITIES - The present invention relates to X-ray imaging technology. In phase-contrast imaging, different types of image information, e.g. absorption image information and differential phase-contrast image information, may be obtained by a single image acquisition process. Individual types of image information comprise different image properties. The present invention relates to a frequency dependent combination of different types of image information to obtain a combined image having improved properties over the individual image information and their respective image information type. Accordingly, an apparatus ( | 06-19-2014 |
20140205057 | DIFFERENTIAL PHASE CONTRAST IMAGING WITH ENERGY SENSITIVE DETECTION - For correcting differential phase image data | 07-24-2014 |
20140286558 | ADAPTIVE APPLICATION OF METAL ARTIFACT CORRECTION ALGORITHMS - An apparatus for and a method of correcting an image for an image artifact. An initial image is corrected by an image artifact corrector ( | 09-25-2014 |
20140288420 | METHOD AND DEVICE FOR IMAGING SOFT BODY TISSUE USING X-RAY PROJECTION AND OPTICAL TOMOGRAPHY - A method and device ( | 09-25-2014 |
20140348440 | AUTOMATIC DETERMINATION OF REGULARIZATION FACTOR FOR ITERATIVE IMAGE RECONSTRUCTION WITH REGULARIZATION AND/OR IMAGE DE-NOISING - A processing component ( | 11-27-2014 |
20150036795 | MULTI-DIRECTIONAL PHASE CONTRAST X-RAY IMAGING - The present invention relates to phase contrast X-ray imaging of an object. In order to provide phase contrast information in more than one direction, an X-ray imaging system is provided that comprises an X-ray source ( | 02-05-2015 |
20150038839 | SPECTRAL IMAGING - An imaging system includes radiation source ( | 02-05-2015 |