Radiation therapy is a medical treatment that uses high-energy radiation to shrink tumors and kill cancer cells. It works by aiming precise doses of radiation to specific areas of the body affected by cancer. Radiation damages the DNA inside cancer cells, preventing them from growing and dividing more. This treatment can be delivered externally, known as external beam radiation therapy, or internally, known as brachytherapy, depending on the type and location of the cancer. Radiation therapy is often used in combination with surgery and chemotherapy to effectively treat various types of cancer. It aims to reduce or destroy tumors, relieve symptoms, and improve overall quality of life for cancer patients.

“radiation therapy”的英语定义和含义

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