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Abstract
Boron neutron capture therapy (BNCT) is a high-dose-intensive radiation therapy that has gained popularity due to advancements in accelerator neutron sources. To determine the dose for BNCT, it is necessary to know the difficult-to-determine boron concentration and neutron fluence. To estimate this dose, we propose a method of measuring the prompt γ-rays (PGs) from the boron neutron capture reaction (BNCR) using a Compton camera. We performed a fundamental experiment to verify basic imaging performance and the ability to discern the PGs from 511 keV annihilation γ-rays. A Si/CdTe Compton camera was used to image the BNCR and showed an energy peak of 478 keV PGs, separate from the annihilation γ-ray peak. The Compton camera could visualize the boron target with low neutron intensity and high boron concentration. This study experimentally confirms the ability of Si/CdTe Compton cameras to image BNCRs.
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Details
1 Gunma University Heavy Ion Medical Center, Maebashi, Japan (GRID:grid.256642.1) (ISNI:0000 0000 9269 4097)
2 Osaka University, Graduate School of Engineering, Osaka, Japan (GRID:grid.136593.b) (ISNI:0000 0004 0373 3971)
3 Gunma University Heavy Ion Medical Center, Maebashi, Japan (GRID:grid.256642.1) (ISNI:0000 0000 9269 4097); The University of Sydney, Sydney Imaging Core Research Facility, Camperdown, Australia (GRID:grid.1013.3) (ISNI:0000 0004 1936 834X)