MRI高分辨率T2WIFS序列联合DWI在肛瘘术前诊断中的应用

Application of MRI high resolution T_(2)WI FS sequence combined with DWI in the preoperative diagnosis of anal fistula

目的探讨核磁共振(MRI)高分辨率T2WI抑脂序列(FS)联合扩散加权成像(DWI)在肛瘘术前诊断中的应用。方法选取2017年6月至2020年6月本院收治的60高度疑似肛瘘患者为研究对象,所有患者均接受MRI高分辨率T2WI FS序列及DWI扫描。以手术结果为金标准,分析T2WI FS序列及DWI检测结果。结果不同检查方式对2条瘘管、3条瘘管、经括约肌型、括约肌上型、括约肌外型、多内口、脓肿的诊断结果比较差异无统计学意义;联合检查对单一瘘管、括约肌间型、单内口肛瘘的诊断准确率高于T2WI FS序列、DWI诊断结果,差异有统计学意义(P<0.05)。结论MRI高分辨率T2WI FS序列及DWI对肛瘘均有较好的诊断效能,但两者联合诊断对肛瘘诊断的准确率优于单一诊断,临床可根据患者情况,采用不同成像模式,以提升诊断效果。

Objective To explore the application of MRI high-resolution T2WI lipid suppression sequence(FS)combined with diffusion weight-ed imaging(DWI)in the preoperative diagnosis of anal fistula.Methods 60 patients with highly suspected anal fistula admitted to our hospital from June 2017 to June 2020 were selected as the research subjects.All patients received MRI high-resolution T2WI FS sequence and DWI scan.The surgical results were as the gold standard,the T2WI FS sequence and DWI test results were analyzed.Results Compared the diagnosis results of 2 fistulas,3 fistulas,transsphincter type,suprasphincter type,sphincter shape,multiple internal ostium,and abscess in different inspection meth-ods,the difference was not statistically significant;the diagnostic accuracy rate of combined examination for single fistula,intersphincteric type,and single internal anal fistula were higher than the diagnosis results of T2WI FS sequence and DWI,and the difference was statistically significant(P<0.05).Conclusion MRI high-resolution T2WI FS sequence and DWI all have good diagnostic efficiency for anal fistula,but the combined diagno-sis of them has better accuracy than single diagnosis.Clinically,different imaging modes can be used according to the patient's condition to im-prove the diagnosis effect.