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Proceedings Paper

Technology and image results of a spectral CT system
Author(s): Bjoern J. Heismann; Stefan Wirth; Silke Janssen; Quirin Spreiter
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Paper Abstract

We report the implementation and first test results of a two-channel spectral Computed Tomography (CT) prototype. We use an energy-resolving CT detector with a sandwich-like two layer set-up. Compared to dual-energy approaches with tube voltage switching, it yields a low and a high energy channel in a one shot measurement. We explain the basic set-up of the system and its calibration. The effects of spectral weighting are examined and the weighting functions w(E) of the detector channels are calculated. We present spectral image data of a water phantom, a set of calibration materials and an organic sample. Finally, we show how the data can be used for quantitative CT measurements. The system is work in progress and currently not available in the United States.

Paper Details

Date Published: 6 May 2004
PDF: 8 pages
Proc. SPIE 5368, Medical Imaging 2004: Physics of Medical Imaging, (6 May 2004); doi: 10.1117/12.530217
Show Author Affiliations
Bjoern J. Heismann, Siemens Medical Solutions (Germany)
Stefan Wirth, Siemens Medical Solutions (Germany)
Silke Janssen, Siemens Medical Solutions (Germany)
Quirin Spreiter, Siemens Medical Solutions (Germany)


Published in SPIE Proceedings Vol. 5368:
Medical Imaging 2004: Physics of Medical Imaging
Martin J. Yaffe; Michael J. Flynn, Editor(s)

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