Abstract: Objective To study the image quality of three-dimensional gradient spin echo （3D-BH-GraSE-MRCP） and three-dimensional volumetric scan based on compressed sensing technology（3D-CS-MRCP） in magnetic resonance cholangiopancreatography（MRCP）. Methods A retrospective analysis was performed on 81 patients who underwent MRCP examination in Sun Yat-sen Memorial Hospital, Sun Yat-sen University from July 2023 to November 2023, and 3D-BH-GraSE-MRCP sequence and 3D-CS-MRCP sequence were used to scan the same patient. Image contrast noise ratio （CNR）, signal-to-noise ratio （SNR） and scanning time in common bile duct, pancreatic duct, cholecystic duct, hepatic duct and secondary bile duct were analyzed and compared according to the obtained images. The image quality of gallbladder, cholecystic duct, common bile duct, pancreatic duct and hepatic duct were subjectively scored. Results The scanning time of 3D-BH-GraSE-MRCP and 3D-CS-MRCP sequences was equal（P>0.05）. There was no significant difference in CNR and SNR of common bile duct, cholecystic duct and hepatic duct between the two images. The CNR（19.73, 13.71） and SNR（27.19, 18.52） of pancreatic duct and secondary bile duct in 3D-BH-GraSE-MRCP sequence image were higher than those in 3D-CS-MRCPsequence image （11.60, 8.76） and SNR（15.23, 12.28）（P<0.05）. 3D-BH-GraSE-MRCP sequence in the gallbladder, cystic duct, common bile duct, the overall image quality rating of intrahepatic duct, background suppression effect and image pseudo reviews points （4.32, 4.46, 4.46, 4.56, 4.79, 4.83） were higher than 3D-CS-MRCP sequence （3.65, 3.79, 4.12, 4.16, 4.48, 4.31） （P<0.05）. Conclusion Compared with 3D-CS-MRCP sequence, 3D-BH-GraSE-MRCP sequence has better image quality and no difference in scanning time in MRCP inspection.

Key words: magnetic resonance cholangiopancreatography, gradient spin echo, compressed sensing

摘要： 目的 探讨单次屏气梯度自旋回波三维磁共振胆胰管成像（3D-BH-GraSE-MRCP）序列与基于压缩感知技术的三维容积扫描（3D-CS-MRCP）序列在磁共振胰胆管成像（MRCP）中的图像质量对比。方法 回顾性收集和分析2023年7月至2023年11月在中山大学孙逸仙纪念医院行MRCP检查时已同时完成3D-BH-GraSE-MRCP序列和3D-CS-MRCP序列扫描的患者81例。根据所得图像分析对比胆总管、胰管、胆囊管、肝总管及二级胆管中的图像对比噪声比（CNR）、信噪比（SNR）和扫描时间,并对胆囊、胆囊管、胆总管、胰管及肝内胆的图像质量进行主观评分。结果 3D-BH-GraSE-MRCP与3D-CS-MRCP两种序列的扫描时间相等（P>0.05）;两种序列图像的胆总管、胆囊管、肝总管CNR及SNR无统计学差异;胰管、二级胆管在3D-BH-GraSE-MRCP序列图像的CNR（19.73、13.71）及SNR（27.19、18.52）高于在3D-CS-MRCP序列图像的CNR（11.60、8.76）及SNR（15.23、12.28）（P均<0.05）;3D-BH-GraSE-MRCP序列在胆囊、胆囊管、胆总管、肝内总管的图像质量评分、背景抑制效果及图像伪影评分（4.32、4.46、4.46,4.56、4.79、4.83）均高于3D-CS-MRCP序列（3.65、3.79、4.12、4.16、4.48、4.31）（P<0.05）。结论 3D-BH-GraSE-MRCP与3D-CS-MRCP相比,在MRCP检查中能更好的显示胰胆管结构和病变,且扫描时间无差异,可为胰胆管病变的临床诊断提供更可靠的影像学依据。

关键词: 磁共振胰胆管成像, 梯度自旋回波, 压缩感知