The efficacy of cranial gamma knife treatment for cerebral arteriovenous malformation (AVM) is gradual, and patients are generally required to review MRI and MRA or 320-row CT at least once six months, one year, or two years after receiving treatment, and if MRI or 320-row CT suggests AVM occlusion, patients are advised to perform DSA examination for further confirmation, and if DSA examination confirms complete occlusion of AVM, it is assessed as a cure. Otherwise, continuous observation until at least three years after gamma knife treatment, if after three years there is still no complete occlusion, can be considered again gamma knife treatment. (1) The rate of occlusion of malformed vessels: on the issue of the rate of occlusion of malformed vessels after gamma knife treatment both at home and abroad have made a lot of observations and summaries for a long time, and there are many reports, some of which have relatively large differences in results. Recently reported occlusion rate of malformed vessels is generally better than the early reports, which may be related to the continuous improvement and development of the resolution and function of MRI, so that the nest of malformed vessels is more and more accurately localized. steiner et al. reported one-year occlusion rate of 33.7%~39.5%, two-year occlusion rate of 79%~86.5%. lunsford et al. reported 227 cases of AVM gamma knife Karlsson reported the results of 945 AVM gamma knife treatment cases treated from 1970 to 1990, and the total rate of complete occlusion of malformed vessels was 56%. In summary, it is now commonly believed that the rate of complete occlusion of malformed vessels after AVM gamma knife treatment is about 40% at one year, 80% at two years, and up to 90% or more at three years. (2) Epilepsy improvement rate: for some AVM patients with combined epilepsy, gamma knife treatment of AVM also has a certain therapeutic effect on epilepsy. This may be related to the reduction of cortical stimulation in the vicinity of AVM after occlusion of malformed vessels and possibly the inhibition of the excitability of seizure-causing cells by the radiation itself, or it may be related to the local hemodynamic changes, or it may be the result of a combination of these factors. 18.6%, and the rate of seizure disappearance with antiepileptic drugs was 56.7%. In pediatric AVM patients, the complete disappearance of epilepsy without medication was as high as 85%. China’s Naval General Hospital Gamma Knife Center reported 62 cases of AVM patients with epilepsy, 10 cases of epilepsy disappeared after Gamma Knife treatment, the number of seizures decreased in 18 cases, with an efficiency of 45%. (3) headache improvement rate: Steiner et al. reported 98 patients with chronic headache, headache disappeared or improved significantly after gamma knife treatment 74 cases, accounting for 75.5%. Kueifa et al. reported 37 patients with migraine headache in occipital AVM, headache disappeared in 71.6% of patients after gamma knife treatment.