本文目的在于评价伽玛刀(γ-刀)立体定向放射手术对听神经瘤的治疗效果。我们用Leksell B型(γ-刀)治疗听神经瘤119例,并随访1～5年。扫描定位用1.5 Tesla磁共振仪,剂量规划系统为γ-plan4.0版。肿瘤体积0.02～20.8cm~3,周边剂量9～17Gy,平均13.1 Gy;中心剂量18～45Gy,平均32.3Gy;靶点数2～10个,平均4.2个。结果肿瘤体积缩小95例(79.8%),其中显效16例(13.4%),即体积缩小超过75%者,无变化14例(11.8%),增大10例(8.4%)。61例(51.3%)听力有保存,11例 This article aims to evaluate the gamma knife (γ-knife) stereotactic radiosurgery for the treatment of acoustic neuroma. We treated 119 patients with acoustic neuroma with Leksell Type B (γ-knife) and were followed up for 1 to 5 years. Scan positioning with 1.5 Tesla magnetic resonance spectrometer, dose planning system for the γ-plan4.0 version. The tumor volume was 0.02-20.8 cm 3 and the peripheral dose was 9-17 Gy, with an average of 13.1 Gy. The median dose was 18-45 Gy, with an average of 32.3 Gy. The target number ranged from 2 to 10 with an average of 4.2. Results The tumor volume was reduced in 95 cases (79.8%), of which 16 cases (13.4%) were markedly effective, that is, the volume decreased more than 75%. No change was found in 14 cases (11.8%) and in 10 cases (8.4%). 61 cases (51.3%) had hearing preservation, 11 cases