| Patent application number | Description | Published |
|---|
| 20080226016 | Reconstruction Algorithm for Object Point Outside the Scan-Field-of-View - CT scanners have a certain scan-field-of-view defined by the fan-angle of the system. According to an exemplary embodiment of the present invention, object points outside the scan-field-of-view may be reconstructed on the basis of a system of linear equations which may be solved iteratively and with reasonable effort. Therefore, explicit regularization techniques may be applied to recover the unknown object function. | 09-18-2008 |
| 20080292157 | Automatic Adaptive Soft Tissue Thresholding for Two-Pass Ct Cone-Beam Artifact Reduction - Since the soft tissue levels in an image usually comprise a variety of values between air and bone boundaries, it may not be obvious a priori what threshold value applies. According to an exemplary embodiment of the present invention, an examination apparatus is provided which is adapted for determining the optimal weight for subtraction of a soft tissue correction image without performing a multitude of forward and backward projections. This may be provided determining a roughness function based on a plurality of subtractions of the soft tissue streak image, each subtraction corresponding to a different weighting of the streak image. | 11-27-2008 |
| 20090116717 | METHOD FOR RECONSTRUCTION IMAGES AND RECONSTRUCTION SYSTEM FOR RECONSTRUCTING IMAGES - A reconstruction method for an image of an object, the reconstruction method comprising receiving a first projection data set representing information about said object, receiving a second projection data set representing information about said object, reconstructing a first image of said object using the first projection data set, reconstructing a second image of said object using the second projection data set, performing a registration between the first image and the second image, and fusing the first image and the second image to said image of said object, wherein the first projecting data set and the second projecting data set are achieved by using a single radiation type. | 05-07-2009 |
| 20090238328 | X-RAY TUBE WITH OSCILLATING ANODE - It is described an X-ray tube ( | 09-24-2009 |
| 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 |
| 20110064202 | METHOD AND SYSTEM FOR GENERATING AN X-RAY BEAM - To scan an object with differently shaped cone beams ( | 03-17-2011 |
