MRI- and CT-determined changes of dysphagia / aspiration-related structures (DARS) during and after radiotherapy.

Delineation of DARS on MRI co-registered to planning CT gave the opportunity to differentiate morphology better than by CT alone. Due to the small number of patients with complete MRI scans over time, we failed to detect a dose dependency of DARS and swallowing and voice disorder posttreatment.