Lung cancer treatment with radiotherapy

External beam radiation therapy is a way to treat lung cancer by killing cancer cells with high-energy beams, like X-rays. During treatment, the patient lies on a table, and a machine moves around the patient to give radiation from different angles. Before treatment, radiologists will do an HRCT scan to make a 3D map of the lung tumor and the tissue around it. Then a treatment plan can be made. It helps target lung lesions while exposing as little healthy tissue as possible. The patient will go through a simulation session, and the radiation therapist will use a machine to find the tumor's exact location; after that, they mark the area that will treat. The patient will get treatment five days a week, once daily, for a few weeks. Most treatment sessions last between 15 and 30 minutes. Then, the patient will lie on the treatment table, and the radiation will come from a machine outside the body. After treatment, the radiation oncologist will see the patient again to check their progress and side effects. Radiotherapy can cause adverse effects like tiredness, skin irritation, and changes in appetite. The severity of these can vary depending on how much radiation a person gets.