Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2009, Vol. 20 ›› Issue (1): 37-41 doi: 10.13538/j.1001-8042/nst.20.37-41

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Monte-Carlo simulation of pinhole collimator of a small field of view gamma camera for small animal imaging

ZHU Jie1,* MA Wenyan1 ZHU Yufeng4 MA Hongguang1 WU Yuelei2 HU Huasi2 ZHANG Boping2 HUO Yonggang1 LIU Silu1 JIAN Bin1 WANG Zhaomin3   

  1. 1 The Second Artillery Engineering College, Xi’an 710025, China 2 Nuclear Engineering Department, School of Energy & Engineering, Xi’an Jiaotong University, Xi’an 710049, China 3 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China 4 Department of Electric Information Engineering, Wuhan Polytechnic University, Wuhan 430023, China
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ZHU Jie, MA Wenyan, ZHU Yufeng, MA Hongguang, WU Yuelei, HU Huasi. Monte-Carlo simulation of pinhole collimator of a small field of view gamma camera for small animal imaging.Nuclear Science and Techniques, 2009, 20(1): 37-41     doi: 10.13538/j.1001-8042/nst.20.37-41

Abstract:

Needs in scintimammography applications, especially for small animal cardiac imaging, lead to develop a small field of view, high spatial resolution gamma camera with a pinhole collimator. However the ideal pinhole collimator must keep a compromise between spatial resolution and sensitivity. In order to design a pinhole collimator with an optimized sensitivity and spatial resolution, the spatial resolution and the geometric sensitivity response as a function of the source to collimator distance has been obtained by means of Monte-Carlo simulation for a small field of view gamma camera with a pinhole collimator of various-hole diameters. The results show that the camera with pinhole of 1 mm, 1.5 mm and 2 mm diameter has respectively spatial resolution of 1.5 mm, 2.25 mm and 3 mm and geometric sensitivity of 0.016%, 0.022% and 0.036%, while the source to collimator distance is 3 cm. We chose the pinhole collimator with hole diameter size of 1.2 mm for our the gamma camera designed based on the trade-off between sensitivity and resolution.

Key words: Monte-Carlo simulation, Pinhole collimator, Gamma camera, Small field of view, High spatial resolution