Effect of Re-imaging Frequency in Adaptive Radiation Therapy (ART) for Head and Neck Patients

Abstract

Ideally ART employs daily re-imaging and deformable image registration (DIR) methods to calculate cumulative dose distributions to assess the need for replanning. If images for ART assessments are acquired less frequently, the dosimetric assessments may differ. In this study, we evaluate the effect of imaging frequency on the cumulative D50% parotid dose.