Development of a position sensitive CsI(Tl) crystal array

• Main Authors: Guo-Zhu Shi, Ruo-Fu Chen, Kun Chen, Ai-Hua Shen, Xiu-Ling Zhang, Jin-Da Chen, Cheng-Ming Du, Zheng-Guo Hu, Guang-Wei Fan
• Format: Article
• Language: English
• Published: Elsevier 2020-04-01
• Series: Nuclear Engineering and Technology
• Online Access: http://www.sciencedirect.com/science/article/pii/S1738573319300245
• ISSN: 1738-5733

A position-sensitive CsI(Tl) crystal array coupled with the multi-anode position sensitive photomultiplier tube (PS-PMT), Hamamatsu H8500C, has been developed at the Institute of Modern Physics. An effective, fast, and economical readout circuit based on discretized positioning circuit (DPC) bridge was designed for the 64-channel multi-anode flat panel PSPMT. The horizontal and vertical position resolutions are 0.58 mm and 0.63 mm respectively for the 1.0 × 1.0 × 5.0 mm3 CsI(Tl) array, and the horizontal and vertical position resolutions are 0.86 mm and 0.80 mm respectively for the 2.0 × 2.0 × 10.0 mm3 CsI(Tl) array. These results show that the CsI(Tl) crystal array with low cost could be applied in the fields of medical imaging and high-resolution gamma camera. Keywords: CsI(Tl), Crystal array, DPC, Discretized positioning circuit, IQSP518 system