Abstract
The authors have developed the stereotactic high dose rotatory irradiation using a Komai's CT guided stereotactic apparatus and Microtron 10 MV X-ray for the lesions under 3 cm of inoperable metastatic brain tumors. After determining precise target lesion using a Komai's CT guided stereotactic apparatus, Microtron 10 MV X-ray was irradiated 30 Gy at once. Namely the Microtron gantry was rotated 360 degrees around the center of the irradiated target on each of three different planes by exchanging the angle of therapeutic bed by 15 degrees. A result of irradiation for 15 lesions of 10 cases in this method have been followed up, using CT or MRI, 1 and 14 months after the irradiation, 4 lesions showed complete response and 6 lesions showed partial response. And seven cases out of 10 cases (70%) had effective responses. We have not experienced side effect of irradiation. Radiosurgery in our stereotactically rotatory irradiation is simple and useful method and it could maintain quality of life of the patiets with metastatic brain tumors betler, even though who do not have good long term prognosis, and can shorten the in hospital treatment similarto gamma knife therapy
