Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (10):
• NUCLEAR ELECTRONICS AND INSTRUMENTATION •
Yi-Lin Liu1 • Jian-Qiang Fu 1 • Yu-Lan Li 1,2 • Yuan-Jing Li 1,2 • Xu-Ming Ma 2 • Lan Zhang 2
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.
3D position-sensitive technique,
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