Readout QDC for CdTe x-ray imager using direct charge treatment

Katsuyuki Takagi; Toshiyuki Takagi; Tsuyoshi Terao; Akifumi Koike; Toru Aoki

doi:10.1117/12.2316419

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14 May 2018 Readout QDC for CdTe x-ray imager using direct charge treatment

Katsuyuki Takagi, Toshiyuki Takagi, Tsuyoshi Terao, Akifumi Koike, Toru Aoki

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Proceedings Volume 10656, Image Sensing Technologies: Materials, Devices, Systems, and Applications V; 106561W (2018) https://doi.org/10.1117/12.2316419
Event: SPIE Commercial + Scientific Sensing and Imaging, 2018, Orlando, Florida, United States

Abstract

X-ray imaging is popular in medical imaging, non-destructive testing and security. Main techniques of X-ray imaging with semiconductor detectors are charge accumulation and photon counting, and the photon counting is expected to identify materials at the same time with taking X-ray photograph by using energy information of X-ray photons. We proposed a direct charge handling method to build a photon counting system with energy information for X-ray imaging. This method operates the charge from the X-ray detector and converts it to encoded digital bit pattern directly without dead time of the front-end circuit. We simulated and built a proposed system to prove operating principals.

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Katsuyuki Takagi, Toshiyuki Takagi, Tsuyoshi Terao, Akifumi Koike, and Toru Aoki "Readout QDC for CdTe x-ray imager using direct charge treatment", Proc. SPIE 10656, Image Sensing Technologies: Materials, Devices, Systems, and Applications V, 106561W (14 May 2018); https://doi.org/10.1117/12.2316419

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