A cost-effective design of compact gamma camera module based on continuous crystal

Authors

Qiu-Sheng Dai, Chinese Academy Of Sciences
Cuilan Zhao, Graduate University Of Chinese Academy Of Sciences
Yujin Qi, University of WollongongFollow

RIS ID

79280

Publication Details

Dai, Q., Zhao, C. & Qi, Y. (2010). A cost-effective design of compact gamma camera module based on continuous crystal. Hejishu, 33 (1), 54-58.

Abstract

This work is aimed at developing a compact gamma camera module of high spatial resolution,based on block scintillation crystal coupling with position sensitive photomultiplier (PSPMT).Monte Carlo simulation was used to study the shrinkage effect and intrinsic spatial resolution of miniature gamma camera module with crystal parameters.The readout electronics and the position determination method of the PSPMT were improved by using a novel truncated center-of-gravity method.Imaging experiments were performed to evaluate our design.The results demonstrate that readout circuit with truncated center-of-gravity (TCOG) can restrict the shrinkage effect;the spatial resolution and shrinkage effect of crystal are improved with reduced thickness and increased light output.It can be concluded that a crystal wafer coupled to PSPMT will have 1-2 mm intrinsic resolution,hence a high cost-effective solution compared to crystal array design.