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Brachytherapy (HDR & LDR) Brachytherapy is a method of delivering radiation to tumors by placing radioactive sources either within or immediately adjacent to tumor tissue. Because the radiation source is very close to the tumor, therapeutic radiation can affect the tumor directly while minimally affecting normal tissue. Brachytherapy can be provided using low dose rate (LDR) or high dose rate (HDR) techniques, depending on the length of time the radioactive sources remain in place.
Brachytherapy, or internal radiation therapy, uses dozens of tiny seeds that contain radioactive material. It may be used to treat early-stage prostate cancer. Needles are used to insert the seeds through your skin into your prostate. The surgeon uses ultrasound to locate your prostate and guide the needles.