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Prostate Cancer
Radiation Therapy
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Radiation from x-rays, gamma rays, and other sources help kill clusters of cancer cells and reduce the size of the tumor. Radiation therapy can consist of either external beam therapy (where the radi
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| X-rays are produced
by an external
radiation source and
focused onto the
prostate from three
directions. |
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ation comes from a source outside the body) or internal radiation therapy (when radioactive material is placed internally, beside the tumor or cancerous cells). Radiation therapy is usually administered five days a week for six weeks, and is considered a local treatment in that only the affected area that receives the radiation will be cured. |
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