Performance characterization of a silicon strip detector for spectral computed tomography utilizing a laser testing system

Cheng Xu; Mats Danielsson; Staffan Karlsson; Christer Svensson; Hans Bornefalk

doi:10.1117/12.872867

16 March 2011 Performance characterization of a silicon strip detector for spectral computed tomography utilizing a laser testing system

Cheng Xu, Mats Danielsson, Staffan Karlsson, Christer Svensson, Hans Bornefalk

Author Affiliations +

Proceedings Volume 7961, Medical Imaging 2011: Physics of Medical Imaging; 79610S (2011) https://doi.org/10.1117/12.872867
Event: SPIE Medical Imaging, 2011, Lake Buena Vista (Orlando), Florida, United States

Abstract

A new silicon strip detector with sub-millimeter pixel size operated in single photon-counting mode has been developed for use in spectral computed tomography (CT). An ultra fast application specific integrated circuit (ASIC) specially designed for fast photon-counting application is used to process the pulses and sort them into eight energy bins. This report characterizes the ASIC and detector in terms of thermal noise (0.77 keV RMS), energy resolution when electron-hole pairs are generated in the detector diode (1.5 keV RMS) and Poissonian count rate with retained count rate linearity and energy resolution (200 Mcps•mm^-2). The performance of the photon-counting detector has been tested using a picosecond pulsed laser system to inject energy into the detector, simulating x-ray interactions. The laser testing results indicate a good energy-discriminating capability of the detector, assigning the pulses to higher and higher energy bins as the intensity of the laser pulses are increased.

Citation Download Citation

Cheng Xu, Mats Danielsson, Staffan Karlsson, Christer Svensson, and Hans Bornefalk "Performance characterization of a silicon strip detector for spectral computed tomography utilizing a laser testing system", Proc. SPIE 7961, Medical Imaging 2011: Physics of Medical Imaging, 79610S (16 March 2011); https://doi.org/10.1117/12.872867

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