Patent application number | Description | Published |
20080205723 | Utilizing Physiological Models to Control Functional Acquisitions - Adaptively controlling an imaging system ( | 08-28-2008 |
20080253515 | Apparatus and Method for Correction of Extension of X-Ray Projections - The present invention relates to an apparatus for iterative scatter correction of a data set of x-ray projections ( | 10-16-2008 |
20090202127 | Method And System For Error Compensation - A method for generating a set of kernels for convolution error compensation of a projection image of a physical object recorded by an imaging system comprises calculating the set of kernels in such a way that for each pixel of the projection image an asymmetric scatter distribution for error compensation is calculated representing a X-ray scatter originating along a ray from an X-ray source to the pixel. | 08-13-2009 |
20090262886 | ROTATIONAL 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 |
20100119139 | METHOD AND SYSTEM FOR ERROR COMPENSATION - A method includes generating a plurality of scatter distributions based on geometric models having different object to detector distances, determining an imaged object to detector distance, and identifying a scatter distribution of the plurality of scatter distributions having a object to detector distance that corresponds to the imaged object to detector distance. The method also includes employing the identified scatter distribution to scatter correct projection data corresponding to the imaged object. Another method includes generating an estimate of wedge scatter by propagating a predetermined wedge scatter profile through an intermediate reconstruction of an object; and employing the estimate to wedge scatter correct the projection data. | 05-13-2010 |
20100189376 | DETECTION VALUES CORRECTION APPARATUS - The present invention relates to a detection values correction apparatus for correcting detection values of a projection image of a multi-energy imaging system. A scatter contribution providing unit provides scatter contributions for different intensities, different energies and different locations on the detection surface of the detection values. A scatter contributions combining unit combines scatter contributions for correcting a detection value, wherein the combined scatter contributions represent the contribution of the scatter, which is caused by radiation of the other detection values of the projection image, to the detection value to be corrected and wherein the scatter contributions are combined under consideration of the intensity, energy and location on the detection surface of the other detection values. A correction unit scatter corrects the detection value of the projection image by using the combined scatter contributions. | 07-29-2010 |
20100208964 | METHOD FOR ELIMINATING SCATTER ARTEFACTS - A method, a computer program as well as a corresponding apparatus for eliminating scatter artefacts that corrupt an image of an object using computed tomography, wherein X-ray projections of the object are at least partially truncated, whereas the method comprises the steps of: reconstructing a truncated image of the object with a limited field of view from the projections; constructing a model of the object in an extended field of view using the truncated image of the object; deriving a scatter estimate by means of Monte-Carlo simulation using the model of object; correcting a projection of the object for X-ray scatter based on the scatter estimate; reconstructing a scatter-corrected image using the corrected projections. | 08-19-2010 |
20100308229 | MOVABLE WEDGE FOR IMPROVED IMAGE QUALITY IN 3D X-RAY IMAGING - When generating a 3D image of a subject or patient, a cone beam X-ray source ( | 12-09-2010 |
20110060566 | METHOD AND APPARATUS FOR SCATTER CORRECTION - A method and apparatus of image reconstruction correcting for photon scatter is provided. A direct physical measurement of scattered photons is used in conjunction with a physical model of the photon scattering process to make the corrections. | 03-10-2011 |
20110110573 | IMAGE GENERATION DEVICE WITH OPTIMIZED DOSE CONTROL - The present invention relates to an image generation device for generating an image from measured data, wherein image quality is optimized for a region of interest and to an imaging system comprising this image generation device. The image generation device comprises a noise determination unit for determining a distribution of noise in a projection domain of the region of interest, and a dose control unit ( | 05-12-2011 |
20110164722 | IMAGING APPARATUS INCLUDING CORRECTION UNIT FOR SCATTERED RADIATION - The present invention relates to an imaging apparatus for generating an image of a region of interest of an object. The imaging apparatus comprises a radiation source ( | 07-07-2011 |
20110211668 | CONVERTER ELEMENT FOR A RADIATION DETECTOR - The invention relates to converter element ( | 09-01-2011 |
20120104262 | EVALUATION OF MEASUREMENTS FROM A PIXELATED DETECTOR - The invention relates to a method and a data processing device for evaluating measurement signals provided by a layered, pixelated radiation detector. A generalized detector response function is provided that describes the energy-related crosstalk caused by radiation incident in the d-th neighboring pixel. With the help of this GDR-function, crosstalk effects can be taken into account to achieve a more accurate determination of imaging parameters related to an imaged object. The approach can particularly be used in spectrally resolved, photon counting CT detectors with small, layered pixels. | 05-03-2012 |
20120224760 | ENHANCED IMAGE DATA/DOSE REDUCTION - A method includes generating enhanced image data based on lower dose image data and a predetermined image quality threshold, wherein an image quality of the enhanced image data is substantially similar to an image quality of higher dose image data, and a system includes an image quality enhancer ( | 09-06-2012 |
20120230470 | ACQUISITION PROTOCOL ASSESSMENT APPARATUS - A method includes generating, via a dose estimator ( | 09-13-2012 |