RADIATION THERAPY-2-LESSON 145
Brachytherapy comprises interstitial therapy and intracavitary therapy. To facilitate delivery of interstitial therapy, a radioactive material for example gold-198, iridium-192 or iodine-125 is put in using a surgery in the surrounding area. The radionuclide is inserted as an element of strands using tiny preserved bud vases or in detachable needles. These stands are called seeds. In the intracavitary therapy the radioactive source is placed closest to the tumor inside a body cavity. For this process radioactive materials like radium, cesium-137 or phosphorous-32 are used. Uterus, cervix, and vaginal cancers are managed using intracavitary therapy. Dispensation of radioactive materials into the bloodstream is one more variety of radiotherapy. For this method of radiotherapy iodine-131 is used to treat hyperthyroidism and thyroid carcinoma. Iodine-131 is dispensed orally in hyperthyroidism and this material mixed with blood and mounts up in the thyroid gland. This...