Preliminary study of depth of interaction measurement for a PET detector

In this work we studied the feasibility of detecting the depth of interaction （DOI） with two layers of crystal arrays of LYSO and BGO scintillators coupled to a position-sensitive photomultiplier tube （PS-PMT） R8900-C12. A front-end electronics was designed, with which we got different pulse shapes...

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Published inChinese physics C Vol. 35; no. 11; pp. 1070 - 1073
Main Author 廖燕飞 章志明 李道武 帅磊 单保慈 黄先超 刘军辉 陈研 王英杰 刘双全 王培林 魏书军 魏龙
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.11.2011
Subjects
Arrays
BGO
BGO (crystal)
Crystals
Detectors
Electronics
Histograms
PET探测器
Positron emission
Tomography
位置灵敏光电倍增管
探测深度
晶体阵列
测量
能量分辨率
高空间分辨率
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ISSN1674-1137
0254-3052
2058-6132
DOI10.1088/1674-1137/35/11/017

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Summary:In this work we studied the feasibility of detecting the depth of interaction （DOI） with two layers of crystal arrays of LYSO and BGO scintillators coupled to a position-sensitive photomultiplier tube （PS-PMT） R8900-C12. A front-end electronics was designed, with which we got different pulse shapes for different crystals to obtain depth information. With the double integration method, we got the DOI histogram of a divided integration ratio of two crystals as the standard to determine the layer-of-interaction. The DOI accuracy, measured by scanning a 22Na slit source along the side of the module, was 98% for the LYSO layer and 95% for the BGO layer. The energy resolution at 511keV was 13.1% for LYSO and 17.1% for BGO. We obtained good crystal separation in 2D position histograms of both layers. These results could be useful in the manufacture of PET scanners with high spatial resolutions.
Bibliography:In this work we studied the feasibility of detecting the depth of interaction （DOI） with two layers of crystal arrays of LYSO and BGO scintillators coupled to a position-sensitive photomultiplier tube （PS-PMT） R8900-C12. A front-end electronics was designed, with which we got different pulse shapes for different crystals to obtain depth information. With the double integration method, we got the DOI histogram of a divided integration ratio of two crystals as the standard to determine the layer-of-interaction. The DOI accuracy, measured by scanning a 22Na slit source along the side of the module, was 98% for the LYSO layer and 95% for the BGO layer. The energy resolution at 511keV was 13.1% for LYSO and 17.1% for BGO. We obtained good crystal separation in 2D position histograms of both layers. These results could be useful in the manufacture of PET scanners with high spatial resolutions.
11-5641/O4
PET; detector; DOI; spatial resolution
LIAO Yan-Fei 1,2,3 ZHANG Zhi-Ming 1,2 LI Dao-Wu 1,2 SHUAI Lei 1,2 SHAN Bao-Ci1,2 HUANG Xian-Chao 1,2,3 LIU Jun-Hui 1,2,3 CHEN Yan 1,2,3 WANG Ying-Jie 1,2,3 LIU Shuang-Quan 1,2,3 WANG Pei-Lin 1,2,3 WEI Shu-Jun1,2 WEI Long1,2;1） 1 Key Laboratory of Nuclear Analysis Techniques, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China 2 Beijing Engineering Research Center of Radiographic Techniques and Equipment, Beijing 100049, China 3 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:1674-1137
0254-3052
2058-6132
DOI:10.1088/1674-1137/35/11/017