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Treatment planning of boron neutron capture therapy for hard-to-treat recurrent breast cancer.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine 2026 Vol.227() p. 112260

Lin TC, Hsueh Liu YW, You WC, Yeh HL, Lu YF

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This retrospective study aimed to investigate the feasibility of treating hard-to-treat recurrent breast cancer using boron neutron capture therapy (BNCT).

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APA Lin TC, Hsueh Liu YW, et al. (2026). Treatment planning of boron neutron capture therapy for hard-to-treat recurrent breast cancer.. Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 227, 112260. https://doi.org/10.1016/j.apradiso.2025.112260
MLA Lin TC, et al.. "Treatment planning of boron neutron capture therapy for hard-to-treat recurrent breast cancer.." Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, vol. 227, 2026, pp. 112260.
PMID 41135208

Abstract

This retrospective study aimed to investigate the feasibility of treating hard-to-treat recurrent breast cancer using boron neutron capture therapy (BNCT). In-house treatment planning system THORplan was used for the treatment planning dose calculation. Dose limits of critical organs in photon therapy were converted to BNCT dose limits. The result showed that by using two-field irradiation to cover the large tumor area, it was possible to deliver 18.5 Gy-w to 80 % of GTV and 20 Gy-w if bolus was used. The use of bolus which shifted the thermal neutron flux peak towards skin surface, reduced dose delivered to internal organs, such as heart, liver and lung. Even with longer irradiation time, the mean dose of heart could be reduced by >15 % and the mean dose of liver could be reduced by > 24 %. This study showed that it is feasible to use BNCT for this hard-to-treat recurrent breast cancer.

MeSH Terms

Humans; Boron Neutron Capture Therapy; Breast Neoplasms; Female; Neoplasm Recurrence, Local; Radiotherapy Planning, Computer-Assisted; Radiotherapy Dosage; Retrospective Studies; Feasibility Studies

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