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Updated: Sep 11, 2025

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
Published on: January 30, 2020
Quantitative imaging of 478-keV prompt gamma rays from Boron neutron capture reactions
Tetsuya Mizumoto1,2, Shotaro Komura3,4, Atsushi Takada5
1Development department, J-BEAM, Inc, 1-7, Nakamaru, Yamadaoka, Naraha- machi, Futaba-gun, Fukushima, 979-0513, Japan. mizumoto@cr.scphys.kyoto-u.ac.jp.
Abstract:
The accurate imaging and quantitative measurement of 478-keV prompt gamma rays are critical for advancing boron neutron capture therapy (BNCT), a promising cancer treatment. Although numerical simulations have indicated that such measurements are feasible, their practical application has proven challenging. This study introduces a gamma-ray imaging detector designed specifically for precise BNCT measurements. Using boron-rich phantom samples, we successfully imaged 478-keV gamma rays and established a linear correlation between gamma-ray production and boron concentration. Furthermore, applying this technique in a recognized BNCT treatment facility demonstrated the detector's effectiveness in monitoring boron dose distribution during neutron irradiation, both in pre-treatment diagnostics and throughout the treatment process.
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