According to Dr. Fengwei Wang, an expert in radiation therapy for tumors, elderly people over 70 years old are weaker and often have other cardiovascular and cerebrovascular system diseases. Radiation therapy is preferred clinically as a treatment method for elderly head and neck tumor patients because of its small damage to tissues and clear treatment goals. Dr. Wang said that tumor is one of the main causes of human death, and how to strictly control the occurrence and development of tumor is one of the bigger problems faced by human beings. After continuous research and exploration, the treatment of tumors has made rapid progress. Head and neck tumors, as part of the whole body tumors, include tumors in the anatomical range from the base of the skull to the clavicle, mainly malignant tumors, including: tumors of the skin of the head and face, otorhinolaryngology, oral cavity, salivary glands, soft tissues of the neck and other parts. Most of the head and neck tumors are squamous carcinomas, which are more sensitive to radiation. As a treatment for local area malignant tumors, the goal of radiotherapy is to improve the gain ratio of radiotherapy as much as possible, i.e. to maximize the dose of radiation concentrated into the lesion, while leaving the surrounding normal tissues and organs less or free from unnecessary irradiation. In particular, the advanced image-guided 3D conformal intensity modulated radiation therapy is considered to be a revolution in the history of radiation oncology and the mainstream of radiation therapy technology in this century. The so-called three-dimensional conformal intensity modulated radiation therapy is a radiation therapy technique that uses various physical means to increase the lethal high-dose irradiation to the tumor target area by adjusting and controlling the intensity distribution of radiation in the irradiation field according to the shape of the tumor target area, while controlling the normal tissues around the tumor below the normal tolerated dose, but there will be position changes during the patient’s fractionated radiation therapy. However, the patient’s position will change during the course of fractionated radiotherapy, and only by tracking the position of the tumor and surrounding normal tissues through image-guided technology in the treatment process and adjusting them at any time can we ensure the accuracy of the treatment and maximize the three-dimensional conformal irradiation of the tumor target area. 80-year-old Master Chen always felt sore throat in recent months. Initially, he thought he had a cold and took some medicine without improvement, but developed into difficulty in swallowing things and ear pain. After examination by experts from the Department of Otolaryngology of People’s Hospital, a pink mass the size of a date was found at the root of his tongue, and the pathology report was squamous cell carcinoma. After one month of treatment through the Department of Oncology and Radiotherapy, the discomfort was significantly relieved, eating was normal, and the tumor disappeared completely. According to Dr. Wang, head and neck tumor patients should consciously quit bad habits such as smoking and alcohol abuse when receiving radiotherapy. This can reduce the damage to normal tissues caused by radiation during radiotherapy, such as throat erosion and mouth ulcers. If the scope of radiotherapy includes the oral cavity, a dentist should be consulted before radiotherapy for a comprehensive examination and treatment of oral lesions if necessary, in order to control the foci of infection in the oral cavity, remove residual tooth roots and repair dental caries, etc. In case of oral surgery such as tooth extraction, radiotherapy should be considered at least 2 weeks after surgery.