![]() ![]() Your cancer care team will help decide how much radiation is needed to treat your cancer and how often you need to get it. But some people may need to go to the treatment center twice a day for a fewer number of weeks. Usually, they visit the treatment center every weekday (Monday through Friday) for a certain number of weeks. Most people get external radiation therapy over many weeks. These machines focus the radiation on the exact location where it needs to be, so that normal tissues are affected as little as possible.Įxternal radiation is usually done during outpatient visits to a hospital or treatment center. ![]() Radiation technology allows the very careful delivery of external beam radiation therapy. A machine is used to aim high-energy rays (or beams) from outside the body into the tumor. External radiation (or external beam radiation) is the most common type of radiation therapy used for cancer treatment.
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