AI Article Synopsis
- The study evaluates a high-purity germanium double-sided strip detector designed for use as a gamma camera in small-animal SPECT, measuring 90 mm in diameter and 10 mm thick.
- Researchers achieved an impressive energy resolution of 0.96% at 140 keV and an intrinsic efficiency of 43.3% at 122 keV, along with a spatial resolution of about 1.5 mm.
- The detector also demonstrated depth-of-interaction estimation capabilities and showed less than 1% strip-level uniformity in flood-corrected images, indicating its potential effectiveness for small-animal imaging.
Article Abstract
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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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3178965 | PMC |
| http://dx.doi.org/10.1088/0031-9155/56/18/007 | DOI Listing |
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