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Preliminary results of a Compton camera based on a single 3D position-sensitive CZT detector

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Abstract

A Compton camera prototype has been developed using a pixelated CZT detector with 4-by-4 pixels. Signals of the detector are read out by a VASTAT ASIC that is controlled by a self-developed DAQ board. The DAQ software is developed using LabVIEW, and the offline Compton imaging codes are written in C++. The prototype has been successfully calibrated, and its capabilities for source detection, spectroscopy, and Compton imaging have been demonstrated using a Cs-137 source. The angular resolution of the 662 keV line is 36° FWHM for the simple back-projection method and 9.6° FWHM for the MLEM reconstruction method. The system is ready to be extended to 11-by-11 pixels in the future, and a better imaging quality can be expected due to the better relative position resolution.

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Authors and Affiliations

  1. Department of Engineering Physics, Tsinghua University, Beijing, 100084, China

    Yi-Lin Liu, Jian-Qiang Fu, Yu-Lan Li & Yuan-Jing Li

  2. Nuctech Co Ltd, Haidian District, Beijing, 10084, China

    Yu-Lan Li, Yuan-Jing Li, Xu-Ming Ma & Lan Zhang

Authors
  1. Yi-Lin Liu
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  2. Jian-Qiang Fu
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  3. Yu-Lan Li
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  4. Yuan-Jing Li
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  5. Xu-Ming Ma
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  6. Lan Zhang
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Correspondence to Yi-Lin Liu.

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Liu, YL., Fu, JQ., Li, YL. et al. Preliminary results of a Compton camera based on a single 3D position-sensitive CZT detector. NUCL SCI TECH 29, 145 (2018). https://doi.org/10.1007/s41365-018-0483-0

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  • DOI: https://doi.org/10.1007/s41365-018-0483-0

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