External Beam Radiation Therapy
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External beam radiation therapy is another treatment for early-stage cancer. A linear accelerator gives off a uniform dose of high energy that is targeted directly at the cancer. Treatment is given in short, daily sessions over a long period in order to decrease damage to normal tissue. There are two types of external beam radiation:
Intensity modulated radiation therapy (IMRT)
An advanced form of external-beam radiation therapy that gives a higher dose of radiation with fewer complications. Outpatient treatments are 20 minutes, five days a week for seven-and-a-half weeks.
Image-guided radiation therapy (IGRT)
A type of therapy where the direction radiation beams are more precisely targeted.