Boron Neutron Capture Therapy (BNCT) Dose Optimization for Esophageal Cancer Using Particle and Heavy Ion Transport Code System (PHITS) Ver. 3.35
DOI:
https://doi.org/10.55981.tdm.2025.13333Keywords:
BNCT, PHITS, Dosimetry, Cancer, RadiationAbstract
Esophageal cancer is a type of cancer that has a globally high incident and mortality rate. Boron Neutron Capture Therapy (BNCT) is a promising radiation therapy method in esophageal cancer treatment due to its ability to deliver high doses selectively to tumor tissue with minimal impact on surrounding healthy tissue. This study aims to optimize BNCT dose distribution, evaluate the irradiation time, and determine the most effective irradiation direction in esophageal cancer. Simulations in this study were carried out using PHITS version 3.35 to model the geometry of esophageal cancer, surrounding organs, and radiation sources used. The phantom represented an ORNL adult male with a 24,69 cm2 tumor. The neutron source came from an accelerator with a 30 MeV proton beam. The boron concentrations analyzed in the cancer tissue were 110, 125, and 140 μg/g. Irradiation from the posterior (PA) direction with a boron concentration of 140 μg/g showed the most optimal BNCT therapy results, with an irradiation time of 15.78 minutes. This technique is capable of delivering an effective dose to the cancerous tissue without exceeding the tolerance limits of the surrounding healthy organs, making it safe for use.
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