Radiation therapy plays a crucial role in the treatment of head and neck cancers (HNC), which include malignancies of the oral cavity, pharynx, and larynx. It is used both as a primary treatment and as an adjuvant therapy alongside surgery and chemotherapy. Modern techniques, such as intensity-modulated radiation therapy (IMRT), allow for precise tumor targeting while sparing surrounding healthy tissues, improving treatment outcomes. Advances in imaging, like PET/CT scans, further enhance radiation accuracy, leading to better control and reduced side effects.While effective, radiation therapy...