目的 探讨X－刀治疗脉络膜黑色素瘤的疗效及照射剂量。 方法 采用60％～80％等剂量曲线覆盖靶区，肿瘤边界最小剂量18．4～27Gy，平均37．9Gy。治疗脉络膜黑色素瘤9例。 结果 平均随访18．7个月。眼球保留率88．9％（89）。治疗后1年计算机体层摄影（CT）、磁共振成像（MRI）检查结果示：肿瘤消失1例，缩小4例，无变化3例，进展1例。肿瘤周边剂量≤20Gy组有效率为25％（14）比＞20Gy组的80％（45）低，但由于例数少而无统计学差异。 结论 X－刀是治疗脉络膜黑色素瘤一种有效的方法。 Objective To investigate the efficacy and radiation dose of X-knife in the treatment of choroidal melanoma. Methods 60% ~ 80% isodose curves were used to cover the target area. The minimum tumor dose was 18.4-27 Gy, averaging 37.9 Gy. Choroidal melanoma in 9 cases. The results were followed up for a mean of 18.7 months. Eyeball retention rate of 88.9% (89). One year after the treatment, computed tomography (CT) and magnetic resonance imaging (MRI) examination showed that the tumor disappeared in 1 case, reduced in 4 cases, unchanged in 3 cases and progression in 1 case. Tumor peripheral dose ≤20Gy group, the effective rate was 25% (14)> 20Gy group 80% (45) low, but due to the small number of cases without significant difference. Conclusion X-knife is an effective method for the treatment of choroidal melanoma.