Imaging performance of a Single-Plane Readout Compton Camera
Abstract
This work presents the design, development, and characterization of a compact Compton camera employing a novel single-plane readout architecture. The proposed concept simplifies conventional multilayer Compton cameras by optically coupling the scatterer and absorber into a single compact detector element using a light guide, enabling readout exclusively from one side with silicon photomultipliers. The system was validated through Monte Carlo simulations, prototype construction, and experimental characterization using standard gamma-ray sources. Detector performance for 511~keV and 662~keV photons was optimized using simulations based on the Geant4 framework, by guiding event selection strategy. Event reconstruction relied on coincidence detection consistent with Compton scattering kinematics, while image reconstruction was performed using maximum likelihood expectation maximization algorithm. The prototype comprises 64 detector elements arranged in an 8×8 matrix, read out by an 8×8 silicon photomultiplier array. Each element consists of two GAGG:Ce scintillators coupled by a 20 mm long light guide. Measured energy resolutions were 8.9%±1.9% and 10.8%±1.6% for the front and back layers, respectively. Successful gamma-ray imaging was demonstrated for Na-22 and Cs-137 sources, achieving angular resolutions of 12.4∘--14.3∘ at 511~keV and 14.3∘--16.8∘ at 662~keV, confirming the feasibility of the proposed single-plane architecture for compact and cost-effective gamma-ray imaging applications.
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BibTeX
@misc{dash2026imaging,
title = {{Imaging performance of a Single-Plane Readout Compton Camera}},
author = {Om Prakash Dash and Tomislav Bokulić and Damir Bosnar and Mihael Makek},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.20841},
eprint = {2609.20841},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.20841},
}
RIS
TY - UNPB
TI - Imaging performance of a Single-Plane Readout Compton Camera
AU - Om Prakash Dash
AU - Tomislav Bokulić
AU - Damir Bosnar
AU - Mihael Makek
PY - 2026
DA - 2026/09/01
PB - arXiv
DO - 10.48550/arxiv.2609.20841
UR - https://arxiv.org/abs/2609.20841
AB - This work presents the design, development, and characterization of a compact Compton camera employing a novel single-plane readout architecture. The proposed concept simplifies conventional multilayer Compton cameras by optically coupling the scatterer and absorber into a single compact detector element using a light guide, enabling readout exclusively from one side with silicon photomultipliers. The system was validated through Monte Carlo simulations, prototype construction, and experimental characterization using standard gamma-ray sources. Detector performance for 511~keV and 662~keV photons was optimized using simulations based on the Geant4 framework, by guiding event selection strategy. Event reconstruction relied on coincidence detection consistent with Compton scattering kinematics, while image reconstruction was performed using maximum likelihood expectation maximization algorithm. The prototype comprises 64 detector elements arranged in an 8×8 matrix, read out by an 8×8 silicon photomultiplier array. Each element consists of two GAGG:Ce scintillators coupled by a 20 mm long light guide. Measured energy resolutions were 8.9%±1.9% and 10.8%±1.6% for the front and back layers, respectively. Successful gamma-ray imaging was demonstrated for Na-22 and Cs-137 sources, achieving angular resolutions of 12.4^∘--14.3^∘ at 511~keV and 14.3^∘--16.8^∘ at 662~keV, confirming the feasibility of the proposed single-plane architecture for compact and cost-effective gamma-ray imaging applications.
ER -