磁共振STIR序列联合T<sub>2</sub>WI压脂序列对肛瘘的诊断价值比较-现代医学

磁共振STIR序列联合T₂WI压脂序列对肛瘘的诊断价值比较

单位：1. 宜宾市第三人民医院放射科, 四川宜宾 644000;
2. 宜宾市第一人民医院放射科, 四川宜宾 644000

分类号：R445

出版年·卷·期（页码）：2020·39·第四期（492-496）

摘要：

目的：探究磁共振STIR序列联合T₂WI压脂序列对肛瘘的诊断价值。方法：选择2017年3月至2018年3月进行检查和治疗的肛瘘患者100例作为研究对象，以手术结果作为金标准统计患者的肛瘘外瘘口、内瘘口以及肛瘘瘘管分支数量，所有患者均进行1.5 T磁共振检查，分别使用T₂WI序列和STIR序列扫描。采用受试者工作特征（ROC）曲线评价对肛瘘的诊断价值。结果：100例肛瘘患者中，共检测出肛瘘外瘘口138个，肛瘘内瘘口142个和肛瘘瘘管分支150个。磁共振扫描结果显示STIR序列对肛瘘内外瘘口和瘘管分支检测的敏感度较高而准确度较低。T₂WI序列对肛瘘内外瘘口和瘘管分支检测的敏感度较低而准确度较高，并且T₂WI序列对肛瘘内外瘘口和瘘管分支检测的敏感度显著低于STIR序列而准确度显著高于STIR序列（P<0.05）。STIR联合T₂WI序列检测肛瘘的ROC曲线下面积为0.912。结论：STIR序列对肛瘘的内外瘘口和瘘管分支具有较高的敏感度，而T₂WI序列具有较高的准确度，并可对肛瘘及其周围的解剖组织进行检测，对于肛瘘的诊断具有更好的效果。

Objective: To investigate the diagnostic value of the STIR sequence combined with T₂WI sequence in patients with anal fistula. Methods: 100 patients with anal fistula who were examined and treated in our hospital from March 2017 to March 2018 were selected as subjects. The number of anal external fistulas, anal internal fistulas and the branches of anal fistula were counted depending on the surgical results as the gold standard. All patients underwent 1.5 T magnetic resonance examination by using T₂WI sequence and STIR sequence scan respectively. The receiver operating characteristic curve(ROC) was used to evaluate its value for anal fistula.Results: There were a total of 138 anal external fistulas, 142 anal internal fistulas and 150 anal fistula branches detected in 100 patients with anal fistula. The results of magnetic resonance imaging showed that the STIR sequence was more sensitive to the detection of anal external and internal fistulas and anal fistula branches, whileits accuracy was lower. The T₂WI sequence was less sensitive and more accurate for the detection of anal external and internal fistulas and anal fistula branches, and the T₂WI sequence was significantly less sensitive to the detection of anal external and internal fistulas and anal fistula branches than the STIR sequence, and its accuracy was significantly higher than STIR sequence(P<0.05). The area under ROC curve of STIR sequence combined with T₂WI sequence in the detection of anal fistula was 0.912.Conclusion: The STIR sequence has high sensitivity to the detection of anal external and internal fistulas and anal fistula branches, while the T₂WI sequence has high accuracy and can detect the anal fistula and its surrounding anatomical tissues, which has a better effect on the diagnosis of anal fistula.

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