MRCP结合薄层T_2WI-STIR序列对胆总管泥沙样结石的诊断准确性

Diagnostic accuracy of MRCP plus thin-slice T_2WI-STIR sequence for detecting choledochal silty stones

目的比较上腹部常规磁共振成像(MRI)结合磁共振胰胆管成像(MRCP)与薄层T2WI-STIR序列结合MRCP对胆总管泥沙样结石的诊断准确性。方法 58例经临床手术或内镜逆行胰胆管造影(ERCP)证实的胆总管泥沙样结石患者均经上腹部常规MRI、MRCP及薄层T2WI-STIR序列扫描。随后,对常规MRI+MRCP与薄层T2WI-STIR序列+MRCP探测胆总管泥沙样结石的检出率进行比较。结果与手术或ERCP所见相对照,常规MRI+MRCP在58例胆总管泥沙样结石患者中检出33例,符合率为56.9%;而薄层T2WI-STIR序列+MRCP检出胆总管泥沙样结石44例,符合率为75.9%。两种方法对胆总管泥沙样结石的检出率有显著性差异(P<0.05)。结论与常规MRI+MRCP比较,薄层T2WI-STIR序列+MRCP对胆总管泥沙样结石有更高的诊断准确性。

Objective To compare the diagnostic accuracy of conventional magnetic resonance imaging（MRI） of the upper abdomen plus magnetic resonance cholangiopancreatography（MRCP） versus thin-slice T2WI-STIR sequence plus MRCP for detecting choledochal silty stones（CSS）.Methods Fifty-eight patients with surgically or endoscopic retrograde cholangiopancreatography（ERCP） proved CSS underwent conventional MRI of the upper abdomen,MRCP and thin-slice T2WI-STIR sequence scans.Subsequently,the detecting rate of thin-slice T2WI-STIR sequence plus MRCP for CSS was compared with that of conventional MRI plus MRCP.Results Compared with surgery or ERCP findings,conventional MRI plus MRCP detected 33 of 58 CSS patients and the corresponding rate was 56.9%,while thin-slice T2WI-STIR scquence plus MRCP detected 44 of 58 CSS patients and the corresponding rate was 75.9%.The detecting rate of above two modalities was significant difference（P 0.05）.Conclusion Compared with conventional MRI plus MRCP,thin-slice T2WI-STIR sequence plus MRCP in detecting CSS have higher diagnostic accuracy.