Physical Aspect of The Gamma Knife and Its Clinical Application / 대한치료방사선과학회지

ABSTRACT

The first Leksell Gamma Knife unit(LGU-type B) for radiosurgery in Asia was installed in Asan Medical Center. Mechanical accuracy, output, dose profiles for each collimators were measure during acceptance test. Sixty eight patients (sixty nine cases) had undergone radiosurgery from May 1990 to September 1990. AVM cases were 24 cases (35%), acoustic tumor 10 (14%), pituitary adenoma 4 (6%), metastatic tumor 18 (26%), meningioma 6 (9%) and others 18 (26%). Dose of 25 Gy-100 Gy was delivered at one time according to disease, location and sizes.