目的 探讨四维磁导航引导CT 定位在经皮穿刺肺活检术中的应用价值 研究。方法 选取我院常规CT引导下经 皮穿刺肺活检术的患者为对照组，四维 磁导航引导CT定位经皮穿刺肺活检术为 观察组，两组患者各30例。比较两组穿 刺手术时间、并发症出现情况，分析四 维磁导航引导CT定位经皮穿刺肺活检、 氩氦刀冷冻治疗方面的技术优势与运用 价值。结果 两组均未有患者发生并发 症，观察组(9.87±2.16)分钟比对照组 (15.89±4.01)分钟穿刺时间短，两组数 据具有统计学差异(t=7.239，P＜0.05)。 观察组出现一例导航工具V-TRACK信号不 稳定。四维磁导航引导CT定位Multiple views手术时间较短，定位精准。结论 四 维磁导航引导CT定位微小病灶穿刺活检， 创伤小，准确定位做到微小病灶早期发现 与确诊肿瘤，获取组织学标本进行基因检 测，利于在治疗的不同时期对患者进行治 疗评估。

Objective To investigate the application value of Four-dimensional CT in percutaneus aspiration lung biopsy. Methods Patients with common CT guided percutaneus aspiration lung biopsy in our hospital were selected as control group and those with Four-dimensional computed tomography were seen as observation group, 30 cases in each group. Compare the piercing operation time, complication situation, technological superiority of Four-dimensional computed tomography in percutaneus aspiration lung biopsy and Ar-He cryoablation treatment of the two groups. Results No complications occurred in patients. Piercing time of observation group (9.87±2.16) min was shorter than control group (15.89±4.01)min, the difference was statistically significant (t=7.239,P<0.05). One cases showed unstable radio signal in navigation tools in observation group. Four-dimensional magnetic guidance CT positioning views multiple operation time is short, precise positioning. Conclusion Four-dimensional CT applied in percutaneus aspiration lung biopsy has smaller trauma, accurate location and can make a definite diagnosis on tumor. It is beneficial fortreatment evaluation of patients at different phases.