By altering their DNA, radiation therapy either kills or retards the growth of cancer cells. Cancer cells that have DNA damage that cannot be repaired either cease proliferating or die. When the injured cells expire, the body degrades and eliminates them. Radiation therapy does not instantly eradicate cancer cells. Before cancer cells experience enough DNA damage to cause them to die, days or weeks of treatment are required. After radiation therapy is finished, cancer cells continue to perish for a few weeks or months. Intense energy beams are used in radiation therapy, a sort of cancer treatment, to kill cancer cells. Although protons or other forms of energy can also be employed, X-rays are most frequently used in radiation therapy. Most frequently, external beam radiation therapy is meant when the phrase "radiation therapy" is used. The high-energy beams used in this form of radiation originate from a device outside of your body and are directed at a specific location on your body.
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