Extracorporeal irradiation brings the tumor bones into a machine with high doses of radiation (about 10,000 to 30,000 Rad, 2 to 6 times the dose of general cancer treatment) to kill the tumor completely. The duration of exposure is about 20 to 30 minutes, depending on the size and shape of the tumor. The history of extracorporeal irradiation was started in 1968 A.D. by two Israeli doctors, Dr. Spira and Dr. Lubin, on malignant osteomas treatments for two patients. Gradually, because of its good effectiveness, it began to adopt widely around the world.

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