目的：探讨利用CT屏幕画线法计划和引导经皮肝肿瘤微波消融穿刺的临床价值。方法：对39例肝肿瘤患者（54个病灶，平均最大径（2.6±1.3） cm）在CT引导下经皮微波消融术中，采用CT屏幕画线计划消融针的穿刺路径和引导穿刺，消融术后即时CT复查，观察病灶变化以及实际针道是否与计划相符来评价屏幕线引导穿刺是否成功，统计微波消融的并发症及近期疗效来评价屏幕线计划的穿刺路径是否满意。结果：54个病灶均顺利完成了微波消融术，所有病灶内均可见散在分布小气泡，其中38个无碘油沉积病灶内可见碳化消融道，表现为消融道前端轨道样低密度影，其走行均与计划相符。本组病灶完全消融率为94.4%（51/54），局部残留率为5.6%（3/54），未出现病灶邻近重要组织器官严重损伤。结论：利用屏幕画线计划和引导消融针穿刺，保证了消融完全和消融安全，值得推广。

Objective: To explore the clinical value of using the CT screen drawing line method to guide the microwave ablation of percutaneous liver tumor. Methods: Thirty-nine cases of liver cancer patients(54 lesions, the average maximum diameter (2.6±1.3) cm) were enrolled. CT guided percutaneous microwave ablation was performed by CT screen drawing line plan. Real-time CT check after ablation was performed to observe and check whether the actual needle was corresponding to the plans. The success of screen wire guided puncture was evaluated. The complication and the recent therapy effect were analyzed. Results: The microwave ablation was successfully completed on the 54 lesions. Scattered small bubbles were seen in all lesions, in the 38 lesions with no iodine oil deposition, carbonized ablation railway lines were shown, which were consistent with plans. The completely melt rate was 94.4%(51/54), and partial residual rate was 5.6%(3/54). No severe tissue damage was found in surrounding important organs. Conclusion: It is worth promoting the use of screen drawing line to guide ablation needle puncture, which can ensure the complete ablation and ablation safety.