Evaluation of an ultra-fast photon-counting energy-resolved ASIC for spectral CT

Cheng Xu; Moa Yveborg; Han Chen; Mats Danielsson; Staffan Karlsson; Christer Svensson; Hans Bornefalk

doi:10.1117/12.911111

8 March 2012 Evaluation of an ultra-fast photon-counting energy-resolved ASIC for spectral CT

Cheng Xu, Moa Yveborg, Han Chen, Mats Danielsson, Staffan Karlsson, Christer Svensson, Hans Bornefalk

Proceedings Volume 8313, Medical Imaging 2012: Physics of Medical Imaging; 83130Y (2012) https://doi.org/10.1117/12.911111
Event: SPIE Medical Imaging, 2012, San Diego, California, United States

Abstract

We have developed an ultra-fast photon-counting energy-resolved application specific integrated circuit (ASIC) for spectral computed tomography (CT). A comprehensive characterization has been carried out to investigate the performance of the ASIC in terms of energy resolution under different photon flux rates and the count rate linearity in photon-counting mode. An energy resolution of 4.7 % has been achieved for 59.5 keV low flux photons. The count rate performance of the ASIC was measured with 120 kVp polychromatic x-rays. The results indicate that the count rate linearity can be kept for a flux rate up to 150 Mphotons s^-1 mm^-2 with retained energy information, and this value is increased to be 250 Mphotons s^-1 mm^-2 in photon-counting mode.

Citation Download Citation

Cheng Xu, Moa Yveborg, Han Chen, Mats Danielsson, Staffan Karlsson, Christer Svensson, and Hans Bornefalk "Evaluation of an ultra-fast photon-counting energy-resolved ASIC for spectral CT", Proc. SPIE 8313, Medical Imaging 2012: Physics of Medical Imaging, 83130Y (8 March 2012); https://doi.org/10.1117/12.911111

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