Development of a Position-Sensitive 4π Compton Camera Based on a Single Segmented Scintillator
- 19 November 2020
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Nuclear Science
- Vol. 67 (12), 2511-2522
- https://doi.org/10.1109/tns.2020.3037896
Abstract
Scintillator-based Compton cameras, which comprise of separated scatter and absorption detectors, neglect the Compton scattering that is followed by a photoelectric effect in a single set of scintillators, wherein the detection efficiency is severely limited. In this study, we propose a three-dimensional position-sensitive Compton camera that uses a single set of scintillators, wherein radiation interactions inside the scintillator can be discriminated. The proposed Compton camera comprises a segmented lutetium-yttrium oxyorthosilicate scintillator coupled with two position-sensitive silicon photomultipliers on both sides. Compton image reconstruction algorithms, such as simple back-projection, list-mode maximum likelihood expectation maximization, and filtered back-projection, were applied and compared. The single position-sensitive Compton camera identified the positions of multiple radiation sources with various energies in a 4π field of view. The SNR and FWHM of a reconstructed 511 keV point source were approximately 12 and 22° after maximum likelihood expectation maximization was applied, and the two 511 keV sources with an angle difference of 40° were separately reconstructed. The intrinsic efficiency of the proposed Compton camera was 2.23 × 10-2 for 511 keV.Keywords
Funding Information
- Nuclear Safety Research Program of the Korea Foundation of Nuclear Safety (KoFONS) through the Nuclear Safety and Security Commission (NSSC) of the South Korea (1903006)
- National Research Foundation of Korea (NRF) grant
- Korea government (2020R1A2C1005924)
This publication has 22 references indexed in Scilit:
- Performance and field tests of a handheld Compton camera using 3-D position-sensitive scintillators coupled to multi-pixel photon counter arraysJournal of Instrumentation, 2014
- Handy Compton camera using 3D position-sensitive scintillators coupled with large-area monolithic MPPC arraysNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2013
- Emergency response to the nuclear accident at the Fukushima Daiichi Nuclear Power Plants using mobile rescue robotsJournal of Field Robotics, 2012
- Development of a gamma-ray imager using a large area monolithic 4 × 4 MPPC array for a future PET scannerJournal of Instrumentation, 2012
- A compact Compton camera using scintillators for the investigation of nuclear materialsNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2010
- Matched Collimators for Pixellated Gamma CamerasPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006
- 4-pi Compton imaging with single 3D position-sensitive CdZnTe detectorPublished by SPIE-Intl Soc Optical Eng ,2004
- List-mode maximum likelihood reconstruction of Compton scatter camera images in nuclear medicinePublished by Institute of Electrical and Electronics Engineers (IEEE) ,1998
- An electronically collimated gamma camera for single photon emission computed tomography. Part I: Theoretical considerations and design criteriaMedical Physics, 1983
- Gamma-radiation imaging system based on the Compton effectProceedings of the Institution of Electrical Engineers, 1977