Schmidgunst, C. and Ritter, D. and Lang, E. (2007) Calibration model of a dual gain flat panel detector for 2D and 3D x-ray imaging. MEDICAL PHYSICS, 34 (9). pp. 3649-3664. ISSN 0094-2405,
Full text not available from this repository. (Request a copy)Abstract
The continuing research and further development in flat panel detector technology have led to its integration into more and more medical x-ray systems for two-dimensional (213) and three-dimensional (3D) imaging, such as fixed or mobile C arms. Besides the obvious advantages of flat panel detectors, like the slim design and the resulting optimum accessibility to the patient, their success is primarily a product of the image quality that can be achieved. The benefits in the physical and performance-related features as opposed to conventional image intensifier systems, (e.g., distortion-free reproduction of imaging information or almost linear signal response over a large dynamic range) can be fully exploited, however, only if the raw detector images are correctly calibrated and postprocessed. Previous procedures for processing raw data contain idealizations that, in the real world, lead to artifacts or losses in image quality. Thus, for example, temperature dependencies or changes in beam geometry, as can occur with mobile C arm systems, have not been taken into account up to this time. Additionally, adverse characteristics such as image lag or aging effects have to be compensated to attain the best possible image quality. In this article a procedure is presented that takes into account the important dependencies of the individual pixel sensitivity of flat panel detectors used in 2D or 3D imaging and simultaneously minimizes the work required for an extensive recalibration. It is suitable for conventional detectors with only one gain mode as well as for the detectors specially developed for 3D imaging with dual gain read-out technology. (c) 2007 American Association of Physicists in Medicine.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COMPUTED-TOMOGRAPHY; FIELD CORRECTION; C-ARM; SYSTEM; EXPERIENCE; MOBILE; IMAGER; flat panel detector (FD); FD conditioning; FD calibration; dual dynamic range; cone beam CT; lag |
| Subjects: | 500 Science > 570 Life sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Biophysik und physikalische Biochemie Biology, Preclinical Medicine > Institut für Biophysik und physikalische Biochemie > Prof. Dr. Elmar Lang |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Dec 2020 12:47 |
| Last Modified: | 01 Dec 2020 12:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/32307 |
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