| Patent application number | Description | Published |
|---|
| 20090010518 | METHOD FOR RECONSTRUCTION OF COMPUTED TOMOGRAPHY REPRESENTATIONS FROM X-RAY CT DATA SETS OF AN EXAMINATION SUBJECT WITH SPIRAL SCANNING - The image reconstruction is implemented along theoretical π-lines, wherein the theoretical π-lines not only lead to interpolated detector data but also can emanate from interpolated source positions. Interpolation thus occurs both at the detector and at the source. | 01-08-2009 |
| 20100046819 | Method and image reconstruction device for generating computed tomography image data - A method is disclosed for generating computed tomography image data of a volume of interest from X-ray CT data sets generated by a computed tomography system during scanning of an examination subject on a helical path rotating around a longitudinal system axis in the infeed direction. In at least one embodiment, at least two volume-based reconstructions of the volume of interest are performed by way of differential back-projection over surfaces constituted by different groups of M-lines, followed in each case by an inverse Hilbert transformation, the groups of M-lines for the reconstructions being selected from different of the following M-line subsets:
| 02-25-2010 |
| 20100135454 | STAGGERED CIRCULAR SCANS FOR CT IMAGING - Certain embodiments provide staggered circular scans for CT imaging. In certain embodiments, a CT imaging system comprises a plurality of source-detector assemblies that are axially offset from one another and rotate about a rotation axis to provide staggered circular CT scanning. | 06-03-2010 |
| 20110052021 | Precise image reconstruction of spiral CT images at optional pitch values - At least one embodiment of the invention relates to a method for the reconstruction of image data of an examined object from measuring data, wherein the measuring data were detected by a detector within and outside of its Tam-Danielsson window during a relative spiral movement between a radiation source of a computer tomography system and the examined object. As a result of the spiral movement, the measuring data outside of the Tam-Danielsson contain interruptions. A mathematically precise first reconstruction of first image data is realized in at least one embodiment based on the measuring data by using only measuring data from the Tam-Danielsson window. A mathematically precise second reconstruction is furthermore realized of second image data from the measuring data in at least one embodiment, using at least among other things measuring data from outside of the Tam-Danielsson window, wherein the interruption of the measuring data is compensated for by using existing measuring data and/or the first image data and/or other image data obtained from existing measuring data. Finally, the first image data and the second image data are combined. | 03-03-2011 |
| 20110091085 | Modification and elimination of back projection weight during the CT image reconstruction - At least one embodiment of the invention relates to a method for the reconstruction of image data from an examined object, using measuring data, wherein the measuring data were first recorded during a relative movement between a radiation source on a computer tomography system and the examined object. In at least one embodiment, the image reconstruction is based on a back projection of the filtered measuring data. During the back projection, a back projection weight that depends on the respective image point is used and the power with which the back projection weight is used is selectable. | 04-21-2011 |
| Patent application number | Description | Published |
|---|
| 20100046819 | Method and image reconstruction device for generating computed tomography image data - A method is disclosed for generating computed tomography image data of a volume of interest from X-ray CT data sets generated by a computed tomography system during scanning of an examination subject on a helical path rotating around a longitudinal system axis in the infeed direction. In at least one embodiment, at least two volume-based reconstructions of the volume of interest are performed by way of differential back-projection over surfaces constituted by different groups of M-lines, followed in each case by an inverse Hilbert transformation, the groups of M-lines for the reconstructions being selected from different of the following M-line subsets:
| 02-25-2010 |
| 20110052021 | Precise image reconstruction of spiral CT images at optional pitch values - At least one embodiment of the invention relates to a method for the reconstruction of image data of an examined object from measuring data, wherein the measuring data were detected by a detector within and outside of its Tam-Danielsson window during a relative spiral movement between a radiation source of a computer tomography system and the examined object. As a result of the spiral movement, the measuring data outside of the Tam-Danielsson contain interruptions. A mathematically precise first reconstruction of first image data is realized in at least one embodiment based on the measuring data by using only measuring data from the Tam-Danielsson window. A mathematically precise second reconstruction is furthermore realized of second image data from the measuring data in at least one embodiment, using at least among other things measuring data from outside of the Tam-Danielsson window, wherein the interruption of the measuring data is compensated for by using existing measuring data and/or the first image data and/or other image data obtained from existing measuring data. Finally, the first image data and the second image data are combined. | 03-03-2011 |
| 20110091085 | Modification and elimination of back projection weight during the CT image reconstruction - At least one embodiment of the invention relates to a method for the reconstruction of image data from an examined object, using measuring data, wherein the measuring data were first recorded during a relative movement between a radiation source on a computer tomography system and the examined object. In at least one embodiment, the image reconstruction is based on a back projection of the filtered measuring data. During the back projection, a back projection weight that depends on the respective image point is used and the power with which the back projection weight is used is selectable. | 04-21-2011 |
