Radiation exposure and clinical validation of autosegmentation models for the supraventricular cardiac conduction system in breast cancer radiotherapy: an institutional perspective

The SAN receives substantial irradiation in right-sided BC patients during IMRT, and RA dose strongly correlates with conduction node doses, suggesting its potential as a clinical surrogate. The CNN-based autosegmentation method enables accurate and efficient delineation of the SAN and AVN, facilitating reliable dosimetric assessment in clinical practice.