Characteristics of parallel-hole and pinhole collimators for nuclear medicine imaging

被引：0
作者：
LIU Silu ZHU Jie The Second Artilleiy Equipment Academy of PLABeijing China Unit of Chinese Peoples Liheration ArmyLingbao China [1 ,2 ,1 ,100085 ,2 ,96261 ,472500 ]
机构：
来源：
NuclearScienceandTechniques | 2012年 / 23卷 / 04期
关键词：
Spatial resolution; Geometric sensitivity; Collimator; Nuclear medicine;
D O I：
10.13538/j.1001-8042/nst.23.226-229
中图分类号：
TH773 [医用光学仪器];
学科分类号：
0803 ;
摘要：
<正>In this paper,the spatial resolution and geometry sensitivity of parallel- and pin-hole collimators in compact gamma camera are presented,and quantitatively compared by GEANT4 code in Monte-Carlo library.The results show that the geometry sensitivity for pinhole collimator rapidly drops with increasing the gamma source-to- collimator distance(SCD);and for parallel-hole collimator,mildly.Meanwhile,the spatial resolution for pin-hole collimator mildly deteriorates;and for parallel-hole collimator,severely.The pin-hole collimator for close imaging objects has higher geometry sensitivity than parallel-hole collimator.Our findings are helpful for setting compact gamma camera collimators in nuclear medicine imaging.
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页码：226 / 229
页数：4
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