Characteristics of parallel-hole and pinhole collimators for nuclear medicine imaging |
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Authors: | LIU Silu ZHU Jie |
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Affiliation: | [1]The Second Artillery Equipment Academy ofPLA, Beijing 100085, China [2]96261 Unit of Chinese People's Liberation Army, Lingbao 472500, China |
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Abstract: | 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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Keywords: | Spatial resolution Geometric sensitivity Collimator Nuclear medicine |
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