Frontiers in Oncology
Beyond the snapshot: continuous optical surface monitoring reveals non-linear temporal dynamics and postural stability window in free-breathing breast radiotherapy
Purpose This study aimed to evaluate the clinical consistency between AlignRT surface monitoring and fan-beam computed tomography (FBCT)–based single-timepoint volumetric verification in free breathing (FB) breast radiotherapy, and to quantitatively characterize the nonlinear temporal dynamics of intrafractional motion. Materials and methods A retrospective analysis was conducted on 485 FB volumetric modulated arc therapy (VMAT) fractions from 38 patients treated following breast conserving surgery. Intrafractional …