Abstract
In this paper, we investigated the performance characteristics of continuous miniature crystal element (cMiCE) detectors. Versions with a 25 mm by 25 mm by 4 mm-thick LSO crystal and with a 50 mm by 50 mm by 8 mm-thick LYSO crystal were evaluated. Both detectors utilize a 64-channel flat panel photomultiplier tube (PMT). The intrinsic spatial resolution for the detectors was evaluated using Anger (i.e., simple centroid) positioning and a statistics based positioning (SBP) algorithm. We also compared the intrinsic spatial resolution for the 8-mm-thick LYSO crystal using different reflective materials (e.g., TFE Teflon, white paint, and a polymer mirror film) applied on the entrance surface of the crystal. The average energy resolution was 20% for the 4-mm-thick LSO crystal and ranged from 16% to 21%, depending upon reflective material, for the 8-mm-thick LYSO crystal. The average intrinsic spatial resolution for the 4-mm-thick crystal was 1.8-mm full width at half maximum (FWHM) for Anger positioning to within 3 mm of the crystal's edge and 1.14-mm FWHM for SBP to within 2 mm of the edge. The average intrinsic spatial resolution for the 8-mm-thick crystal was 2.2-mm FWHM for Anger positioning to within 8 mm of the crystal's edge and 1.3- to 1.5-mm FWHM (depending on reflective material used) for SBP to within 2 mm of the edge. Intrinsic spatial resolution is reported without correcting for point source size. The point spot flux had a FWHM of about 0.52 mm. The SBP algorithm resulted in significant improvement in intrinsic spatial resolution, linearity of positioning result, and effective field of view (FOV) for our cMiCE detector.
Original language | English |
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Article number | 1710231 |
Pages (from-to) | 2513-2518 |
Number of pages | 6 |
Journal | IEEE Transactions on Nuclear Science |
Volume | 53 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2006 Oct |
Externally published | Yes |
Bibliographical note
Funding Information:Manuscript received February 27, 2006. This work was supported in part by the NIH-NIBIB by Grants R21 EB001563 and R01 EB002117. T. Ling is with the Department of Physics, University of Washington, Seattle, WA 98195 USA (e-mail: [email protected]). K. Lee was with the University of Washington, Seattle, WA 98195 USA. He is now with the Department of Electrical Engineering, Kongju National University, Korea (e-mail: [email protected]). R. S. Miyaoka is with the Radiology Department, University of Washington, Seattle, WA 98195 USA (e-mail: [email protected]). Digital Object Identifier 10.1109/TNS.2006.882296
Keywords
- Continuous crystal
- Position sensitive photomultiplier tube (PS-PMT)
- Positioning algorithm
- Small animal PET
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering
- Electrical and Electronic Engineering