目的探讨磁共振(MRI)在检查肛 瘘中的应用价值。方法 选取医院经手术 病理证实为肛瘘的41例患者作为研究对 象，术前均行MRI扫描，分析其影像学特 点，并与术后病理对照。结果 以术后病 理作为“金标准”，术前MRI诊断主瘘管 的准确度率和灵敏度分别为100%、100%； 瘘管分支准确度率和灵敏度为88.69%、 96.0%；内口准确度率和灵敏度分别为 95.08%、96.67%；外口准确度率和灵敏度 分别为96.42%、98.18%；脓肿准确度率和 灵敏度分别为95.83%、95.83%；术前MRI 诊断肛管括约肌间型、经肛管括约肌型、 肛管括约肌上型、肛管括约肌的符合率分 别为92.59%、83.33%、100%、100%。结论 术前MRI诊断肛瘘结构、分型等与术后病 理的符合率高，可为临床确定治疗方案提 供资料，有利于提高治疗效果。

Objective To explore the application value of magnetic resonance imaging (MRI) in the examination of anal fistula. Methods 41 patients with anal fistula diagnosed by operation and pathology in the hospital were selected as the study object. Before operation, they all received MRI scanning and the imaging characteristics were analyzed and compared with postoperative pathology. Results Taking the postoperative pathology as the "gold standard", the accuracy rate and sensitivity of preoperative MRI in diagnosis of main fistula respectively were 100% and 100% while of fistula branch were 88.69% and 96.0%; of the internal opening were 95.08% and 96.67%; of the external opening were 96.42% and 98.18%; of abscess were 95.83% and 95.83%. The coincidence rates of preoperative MRI in diagnosis of anal sphincter inter-type, the type of per-anal sphincter, anal sphincter superior type and anal sphincter respectively were 92.59%, 83.33%, 100% and 100%. Conclusion The coincidence rates between preoperative MRI in the diagnosis of anal fistula structure, classification, etc. and postoperative pathology are high, which can provide information for clinical treatment programs and is helpful to improve the therapeutic effect.