Temporally Feathered Radiation Therapy (TFRT) for Head and Neck Squamous Cell Carcinoma

The primary objective of this study is to determine the feasibility of TFRT planning and delivery for head and neck squamous cell carcinoma. Secondary objectives include estimating grade 3-5 acute toxicity (within 90 days) and describing patient-reported outcomes (PRO) of toxicity during and after TFRT. This study is planned as a single arm feasibility trial to demonstrate clinical delivery of TFRT plans. Five patients will be accrued as a single cohort. When using standard-of-care intensity modulated radiation therapy (IMRT), a single radiation plan is created and delivered on a daily basis Monday-Friday for a total of 7 weeks. In contrast, when using TFRT, up to 5 different plans are created and delivered each specific day of the week. Treatments will still occur on a daily basis Monday-Friday for 7 weeks. In each of these radiation plans used for TFRT, the radiation dose that will be delivered to the nearby healthy tissues will vary, allowing for increased time for normal tissue to recover from radiation-induced damage. Once weekly, a slightly higher radiation dose will be delivered to the "feathered" organ. On the remaining four days of the week, a slightly lower radiation dose will be delivered to the "feathered" organ. The radiation dose that will be delivered to the areas of cancer will not be changed. In this study, only the radiation dose delivered to the normal healthy tissues will be changed.