Publication: A depth-encoding PET detector module with improved spatial sampling
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1998
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Tutors
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IEEE
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Abstract
Detector modules in small ring diameter PET scanners
must possess depth-of-interaction (DOI) encoding, increased
spatial sampling, high sensitivity and the ability to handle high
photon input rates without excessive pulse pileup or random
coincidences. We created such a module by optically
coupling an entrance array of individual LGSO crystals to an
exit array of individual GSO (and other) crystals that was, in
turn, optically and directly coupled to a miniature PSPMT.
DO1 was determined for each event by delayed charge
integration (DCI), a technique that exploits differences in light
decay time between GSO and LGSO.
Spatial sampling in 3D was increased by introducing a half
crystal pitch spatial offset between the entrance and exit arrays
in both the X and Y directions. Position detection accuracy in
both the LGSO and GSO layers, and the accuracy of DO1
assignment of events to either layer was high. These results
suggest that this combination of scintillators and
acquisition/processing methods may be particularly useful in
the design of high performance, small ring diameter PET
scanners for small animal imaging
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Proceeding of: 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference, Toronto, Ont., 08 - 14 Nov. 1998
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Bibliographic citation
1998 IEEE Nuclear Science Symposium Conference Record, 1998, vol. 2, pp. 1255 - 1258