MRI - Guided Adaptive RadioTHerapy for Dysphagia in Head and Neck Cancer

"Radiotherapy: All patients were treated with Unity MRI Linac intensity modulated radiation therapy, daily imaging of MRI-IGRT and online target delineation, redesign, and total radiation dose: GTV 70Gy/33f, GTVLN 70Gy/33f, CTV 60Gy/33f, CTVLN 54Gy/33f, 5 days per week. Dose limit: The average dose to the upper, middle, and lower pharyngeal constrictor muscles is ≤ 40-50Gy, with oropharyngeal cancer requiring an average dose to the upper, middle, and lower pharyngeal constrictor muscles to be ≤ 50Gy and ≤ 20Gy; Lower pharyngeal cancer requires an average dose of ≤ 40Gy for the upper and middle pharyngeal constrictor muscles, and ≤ 50Gy for the lower pharyngeal constrictor muscles.~chemotherapy: cisplatin 75mg/m2, 21 days per cycle, a total of 3 cycles."