Current positron emission mammography (PEM) depth of interaction (DOI) enabling detectors have low scintillator to photodetector encoding ratios, RE causing high system complexity and cost. The modularized dual-ended readout block (DERB) detector combines the Anger logic block detector with dual-ended readout to increase RE while measuring DOI. To investigate the trade-off between RE and spatial resolution, scalable
DERB detectors with varying RE and light guide thickness were modelled with Monte-
Carlo. Simulation showed RE can increase up to six-fold compared to the dual-ended readout design without significantly degrading spatial resolution. Experimental characterization of a RE = 9 : 8 DERB detector was found to achieve super-resolution <0.5 mm for resolving crystal indices, DOI resolution of ~5 mm FWHM, and mean energy resolution of 20% without recovering photons lost to neighbouring detector modules. The model was validated by agreement of simulation results adjusted for detector quantum efficiency with experimental results.
| Identifer | oai:union.ndltd.org:TORONTO/oai:tspace.library.utoronto.ca:1807/30563 |
| Date | 06 December 2011 |
| Creators | Cuddy, Sarah Grace |
| Contributors | Rowlands, John A. |
| Source Sets | University of Toronto |
| Language | en_ca |
| Detected Language | English |
| Type | Thesis |
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