压缩感知及梯度自旋回波序列优化3D MR胰胆管成像图像质量的可行性  

Feasibility of compressed sensing and gradient and spin echo sequence for optimizing image quality of 3D MR cholangiopancreatography

作　　者：李玮[1] 全硕 张晓东[1] 郭小超[1] 王霄英[1] 王可[1] LI Wei;QUAN Shuo;ZHANG Xiaodong;GUO Xiaochao;WANG Xiaoying;WANG Ke(Department of Radiology,Peking University First Hospital,Beijing 100034,China)

机构地区：[1]北京大学第一医院医学影像科,北京100034

出　　处：《中国介入影像与治疗学》2022年第11期720-724,共5页Chinese Journal of Interventional Imaging and Therapy

摘　　要：目的观察应用压缩感知(CS)及梯度自旋回波(GRASE)序列优化3D MR胰胆管成像(MRCP)图像质量的可行性。方法回顾性分析105例因疑诊胆石症而接受1.5T MR常规呼吸触发MRCP(RT-MRCP)、RT-CS-MRCP、屏气GRASE-MRCP(BH-GRASE-MRCP)检查患者,比较3种MRCP图像质量及扫描时间。结果除主胰管外,RT-MRCP与RT-CS-MRCP图像显示胰胆管各段及胆囊、胆囊管的主、客观评价结果差异均无统计学意义(P均>0.05)。RT-MRCP及RT-CS-MRCP图像客观评价结果及背景抑制均优于BH-GRASE-MRCP(P均<0.05),BH-GRASE-MRCP图像显示胰胆管各段及伪影的主观评分结果均优于RT-CS-MRCP,显示胆囊管及胆囊评分均优于RT-MRCP及RT-CS-MRCP(P均<0.05)。相比RT-MRCP[394.00(341.00,432.00)s],RT-CS-MRCP[144.50(105.25,150.00)s]及BH-GRASE-MRCP(15.40 s)的扫描时间明显缩短。结论应用CS及GRASE可优化1.5T 3D MRCP图像质量并缩短扫描时间。Objective To investigate the feasibility of compressed sensing(CS)and gradient and spin echo(GRASE)sequence for optimizing image quality of 3D MR cholangiopancreatography(MRCP).Methods Imaging data of 105 patients with suspected cholelithiasis who underwent 1.5T MR routine respiratory triggered(RT-MRCP),RT-CS-MRCP and breath-hold GRASE-MRCP(BH-GRASE-MRCP)examination were retrospectively analyzed.The objective image quality,subjective evaluation and scanning time of the above 3 kinds MRCP images were compared.Results Except for the main pancreatic duct,no significant difference of subjective nor objective image quality evaluations was found between RT-MRCP and RT-CS-MRCP(all P>0.05).The objective evaluation and background suppression of RT-MRCP and RT-CS-MRCP were better than that of BH-GRASE-MRCP(all P<0.05).The subjective scores of each structures of pancreaticobiliary duct,gallbladder and cystic duct,as well as artifacts on BH-GRASE-MRCP images were higher than those of RT-CS-MRCP(all P<0.05),and the scores of cystic duct and gallbladder were higher than those of RT-MRCP and RT-CS-MRCP(all P<0.05).Compared with RT-MRCP(394.00[341.00,432.00]s),the scanning time of RT-CS-MRCP(144.50[105.25,150.00]s)and BH-GRASE-MRCP(15.40 s)were significantly shortened.Conclusion CS and GRASE could be used for optimizing imaging quality and shorten scanning time of 1.5T 3D MRCP.

关 键 词：胆道疾病 磁共振胰胆管成像 压缩感知 梯度自旋回波序列 

分 类 号：R575[医药卫生—消化系统] R445.2[医药卫生—内科学]