Study of spatial resolution and depth of interaction of APD-based PET detector modules using light sharing schemes

Using 4 /spl times/ 8 Hamamatsu S8550 APD matrices with 1.6 mm /spl times/ 1.6 mm pixels and a 2.3 mm pitch, we compared the spatial resolution of light sharing schemes using block detectors to detector modules using 1-to-1 coupling between individual 2 mm /spl times/ 2 mm /spl times/ 10 mm LSO crys...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2003-10, Vol.50 (5), p.1415-1419
Main Authors: Bruyndonckx, P., Leonard, S., Jiangui Liu, Tavernier, S., Szupryczynski, P., Fedorov, A.
Format: Article
Language:English
Subjects:
Animals
Blocking
Costs
Crystals
Detectors
Mathematical analysis
Modules
Neural networks
Optical coupling
Photonic crystals
Pixels
Positron emission tomography
Sensor arrays
Solid scintillation detectors
Spatial resolution
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Summary:Using 4 /spl times/ 8 Hamamatsu S8550 APD matrices with 1.6 mm /spl times/ 1.6 mm pixels and a 2.3 mm pitch, we compared the spatial resolution of light sharing schemes using block detectors to detector modules using 1-to-1 coupling between individual 2 mm /spl times/ 2 mm /spl times/ 10 mm LSO crystals and APD pixels. In addition, depth of interaction (DOI) measurement capabilities of the block detector were studied. Using neural network methods to determine the interaction position in a 10 mm thick LSO block, we achieved an intrinsic spatial resolution of 1.5 mm FWHM compared to 2.06 mm for individual readout. The DOI resolution varied between 1.8 and 3.0 mm FWHM.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2003.817348