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- W3109718667 abstract "Scintillator-based Compton cameras, which comprise of a 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 3-D positionsensitive 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 backprojection, list-mode maximum likelihood expectation maximization (MLEM), 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 signal-to-noise ratio (SNR) and full-width at half-maximum (FWHM) of a reconstructed 511-keV point source were approximately 12° and 22°, respectively, after MLEM 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 <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>-2</sup> for 511 keV." @default.
- W3109718667 created "2020-12-07" @default.
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- W3109718667 date "2020-12-01" @default.
- W3109718667 modified "2023-09-23" @default.
- W3109718667 title "Development of a Position-Sensitive 4π Compton Camera Based on a Single Segmented Scintillator" @default.
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- W3109718667 doi "https://doi.org/10.1109/tns.2020.3037896" @default.
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