1.5T封闭式超导磁共振引导经皮肝穿刺活检的临床应用

Clinical application of 1.5T closed superconducting MR-guided percutaneous liver biopsy

目的研究1.5T封闭式MR引导下进行肝穿刺活检的可行性。方法分析23例MR引导肝穿刺活检患者的临床资料。将穿刺针在MR图像上的显示直径与其真实外径的比值,定义为伪影倍数,以评价穿刺针的显影情况。以取材成功率和病理符合率评价有效性,以并发症评价安全性。结果20 G定位针在T2的伪影倍数为2.51±0.53。16 G套管针在T2的伪影倍数为2.44±0.63,在T1为4.14±0.98。穿刺活检的取材成功率100%,病理符合率95.7%。仅1例出现包膜下出血,无断针、感染、胆漏等穿刺活检相关并发症发生。结论在1.5T封闭式MR引导下,使用磁兼容套管针,进行肝穿刺活检是安全、可行的。

Objective To study the feasibility of percutaneous liver biopsy guided by 1.5T closed MR imaging.Methods The clinical data of 23 patients,who received MR-guided liver biopsy,were analyzed.The ratio of the displayed diameter of the puncture needle on MR image to its real outer diameter was defined as the artifact ratio,which was used to evaluate the visualization quality of the puncture needle.The effectiveness of biopsy was assessed by the success rate of sampling and the pathological coincidence rate,and the safety was evaluated by complications.Results The artifact multiple of 20G locating needle on T2 image was(2.51±0.53),the artifact multiple of 16G trocar needle on T2 image was(2.44±0.63),and on T1 image was(4.14±0.98).The sampling success rate of puncture biopsy was 100%,the pathological coincidence rate was 95.7%.Subcapsular bleeding was observed in one patient only.No puncture biopsy-related complications such as puncture needle fracture,infection or bile leakage occurred.Conclusion Under guidance of 1.5T closed MR imaging and by using magnetic compatibility trocar needle,the performance of percutaneous liver biopsy is safe and feasible.(J Intervent Radiol,2021,30:288-291).