A High-Rate Energy-Resolving Photon-Counting ASIC for Spectral Computed Tomography

Abstract

We describe a high-rate energy-resolving photon-counting ASIC aimed for spectral computed tomography. The chip has 160 channels and 8 energy bins per channel. It demonstrates a noise level of ENC =214 electrons at 5 pF input load at a power consumption of <; 5 mW/channel. Maximum count rate is 17 Mcps at a peak time of 40 ns, made possible through a new filter reset scheme, and maximum read-out frame rate is 37 kframe/s.