对比分析屏气三维梯度-自旋回波与呼吸门控触发三维快速自旋回波MR胰胆管成像

目的 对比屏气三维梯度-自旋回波MR胰胆管造影（3D-Grase-MRCP）与呼吸门控触发三维快速自旋回波MR胰胆管造影（3D-Tse-MRCP）图像质量。方法 对96例疑诊胰腺或胆道疾病患者行屏气3D-Grase-MRCP和呼吸门控触发3D-TSE-MRCP序列扫描，比较2种序列图像质量评分、显示病变情况及胆总管对比噪声比（CNR）。将3D-Grase-MRCP图像分为屏气组和屏气配合不佳组，对比2组图像质量评分。结果 3D-Tse-MRCP图像胆总管CNR值357.08（209.73，594.38）]高于3D-Grase-MRCP256.14（141.54，417.87），Z=-3.01，P<0.05]。3D-Grase-MRCP图像胆囊、胆囊管、胆总管及肝内胆管主要分支评分均高于3D-Tse-MRCP（P均<0.01），显示胆囊结石（n=42）和胆囊管结石（n=7）更清晰（P均<0.05）；屏气组（n=68）3D-Grase-MRCP图像胆囊、胆囊管、胆总管、胰管及肝内胆管主要分支质量评分均高于屏气配合不佳组（n=28，P均<0.01）。结论 屏气3D-Grase-MRCP图像质量及显示病变优于呼吸门控触发3D-Tse-MRCP，且扫描时间明显缩短。

Comparison on three-dimensional MR cholangiopancreatography with breath-hold gradient-spin echo and respiratory gated triggering turbo-spin echo

Objective To compare the image quality of three-dimensional MR cholangiopancreatography with breath-hold gradient-spin echo (3D-Grase-MRCP) and respiratory gated triggering turbo-spin echo (3D-Tse-MRCP). Methods Totally 96 patients with suspicious pancreatic or biliary tract diseases underwent 3D-Grase-MRCP and 3D-Tse-MRCP scanning. The image quality scores, lesion display and contrast noise ratio (CNR)of the common bile duct were compared and analyzed between 3D-Grase-MRCP and 3D-Tse-MRC. The 3D-Grase-MRCP images were divided into hold-breath group and poor hold-breath group, and the image quality scores were compared between 2 groups. Results CNR of common bile duct on 3D-Tse-MRCP images (357.08209.73, 594.38]) were higher than that on 3D-Grase-MRCP (256.14141.54, 417.87],Z=-3.01, P<0.05). The imaging scores on 3D-Grase-MRCP of the gallbladder, ductus cysticus, common bile duct and intrahepatic bile duct were higher than those on 3D-Tse-MRCP (all P<0.01). 3D-Grase-MRCP showed gallstones (n=42) and cystic duct stones (n=7) more clearly than 3D-Tse-MRCP (both P<0.05). Imaging scores of gallbladder, ductus cysticus, common bile duct, pancreatic duct and intrahepatic bile duct on 3D-Grase-MRCP in hold-breath group (n=68) were higher than those in poor hold-breath group (n=28) (all P<0.01). Conclusion The imaging quality and lesion display of breath-hold 3D-Grase-MRCP sequence are superior to those of respiratory gated triggering 3D-Tse-MRCP sequence with significantly shortened scanning time, which is expected to be used as a new method for MRCP.