Increasing the dose efficiency in silicon photon-counting detectors utilizing dual shapers

Christel Sundberg; Martin Sjölin; Jacob Wikner; Christer Svensson; Mats Danielsson

doi:10.1117/12.2293453

9 March 2018 Increasing the dose efficiency in silicon photon-counting detectors utilizing dual shapers

Christel Sundberg, Martin Sjölin, Jacob Wikner, Christer Svensson, Mats Danielsson

Proceedings Volume 10573, Medical Imaging 2018: Physics of Medical Imaging; 105734W (2018) https://doi.org/10.1117/12.2293453
Event: SPIE Medical Imaging, 2018, Houston, Texas, United States

Abstract

Silicon photon-counting spectral detectors are promising candidates as the next generation detectors for medical CT. For silicon detectors, a low noise floor is necessary to obtain good detection efficiency. A low noise floor can be obtained by having a slow shaping filter in the ASIC, but this leads to a long dead-time, thus decreasing the count-rate performance. In this work, we evaluate the benefit of utilizing two sub-channels with different shaping times. It is shown by simulation that utilizing a dual shaper can increase the dose efficiency for equal count-rate capability by up to 17%.

Citation Download Citation

Christel Sundberg, Martin Sjölin, Jacob Wikner, Christer Svensson, and Mats Danielsson "Increasing the dose efficiency in silicon photon-counting detectors utilizing dual shapers", Proc. SPIE 10573, Medical Imaging 2018: Physics of Medical Imaging, 105734W (9 March 2018); https://doi.org/10.1117/12.2293453

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