NDLI: Sensitivity Improvement of Time-of-Flight (ToF) PET Detector Through Recovery of Compton Scattered Annihilation Photons

Content Provider	IEEE Xplore Digital Library
Author	Wagadarikar, A.A. Ivan, A. Dolinsky, S. McDaniel, D.L.
Copyright Year	1963
Abstract	In PET detector designs, the scintillator material can be partitioned such that a block of crystals share timing/energy readout electronics. A fraction of the incident 511 keV photons produce simultaneous events in two adjacent block readout channels due to Compton scattering of photons from the primary block into an adjacent block. These inter-block Compton scatter events are typically not processed in current PET scanners. We demonstrated experimentally that inter-block Compton events may be recovered as valid events with a corrected time stamp and estimated position of initial interaction in a pair of adjacent 16 × 48 × 25 mm³ LYSO blocks. The recovery process resulted in a block sensitivity improvement of 5% at the expense of a small (2%) degradation in the average coincidence resolving time of each block. Implementation of the recovery procedure on a ToF-PET scanner constructed using such blocks is expected to result in an overall scanner sensitivity improvement of 20% without significant processing overhead.
Sponsorship	IEEE Nuclear and Plasma Sciences Society Computer Applications in Nuclear and Plasma Sciences (CANPS) Lawrence Berkeley Lab. Lawrence Livermore Nat. Lab. APS College of William and Mary Continuous Electron Beam Accelerator Facility NASA Defence Nuclear Agency Sandia National Laboratories Jet Propulsion Laboratory Brookhaven Nat. Lab. Lawrence Livermore Nat. Lab IEEE/NPPS Radiat. Effects Committee Defence Nuclear Agency/DoD Sandia National Laboratories/DOE Jet Propulsion Laboratory/NASA Phillips Lab./DoD
Starting Page	121
Ending Page	125
Page Count	5
File Size	1076987
File Format	PDF
ISSN	00189499
Volume Number	61
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Crystals Photonics Sensitivity Detectors Energy measurement Positron emission tomography Timing positron emission tomography Detector sensitivity Inter-block Compton scatter
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Electrical and Electronic Engineering Nuclear Energy and Engineering

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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Sensitivity Improvement of Time-of-Flight (ToF) PET Detector Through Recovery of Compton Scattered Annihilation Photons

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