Effect of detector time delay and its correction in multiple source computed tomography

A. Thran; P. Forthmann; R. Proksa

doi:10.1117/12.811869

13 March 2009 Effect of detector time delay and its correction in multiple source computed tomography

A. Thran, P. Forthmann, R. Proksa

Proceedings Volume 7258, Medical Imaging 2009: Physics of Medical Imaging; 72582C (2009) https://doi.org/10.1117/12.811869
Event: SPIE Medical Imaging, 2009, Lake Buena Vista (Orlando Area), Florida, United States

Abstract

In scintillating detectors x-rays are converted to luminescent photons with a time delay. The corresponding time resolution of the detector can have - in contrast to usual multi-slice CT - a deteriorating effect in new CT concepts with multiple sources illuminating one detector, because x-ray intensities measured here in consecutive projections correspond to the absorption along paths through very different regions of the object. A new analytical description of these effects is presented and a correction algorithm is derived. It is also shown that the detector time delay and its correction can lead to a noticeable increase of image noise.

Citation Download Citation

A. Thran, P. Forthmann, and R. Proksa "Effect of detector time delay and its correction in multiple source computed tomography", Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 72582C (13 March 2009); https://doi.org/10.1117/12.811869

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