期刊
PHYSICS IN MEDICINE AND BIOLOGY
卷 56, 期 18, 页码 5877-5888出版社
IOP PUBLISHING LTD
DOI: 10.1088/0031-9155/56/18/007
关键词
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资金
- Office of Science (BER), US Department of Energy [DE-SC0002437]
- NIH/National Center for Research Resources [R44RR031937]
- NIH/National Cancer Institute [R25CA136440]
We present an initial evaluation of a mechanically cooled, high-purity germanium double-sided strip detector as a potential gamma camera for small-animal SPECT. It is 90 mm in diameter and 10 mm thick with two sets of 16 orthogonal strips that have a 4.5 mm width with a 5 mm pitch. We found an energy resolution of 0.96% at 140 keV, an intrinsic efficiency of 43.3% at 122 keV and a FWHM spatial resolution of approximately 1.5 mm. We demonstrated depth-of-interaction estimation capability through comparison of pinhole acquisitions with a point source on and off axes. Finally, a flood-corrected flood image exhibited a strip-level uniformity of less than 1%. This high-purity germanium offers many desirable properties for small-animal SPECT.
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