Magnetic resonance cholangiopancreatography using optimized integrated combination with parallel imaging and compressed sensing technique
Magnetic resonance cholangiopancreatography using optimized integrated combination with parallel imaging and compressed sensing technique
复制标题
DOI：
10.1007/s00261-018-01886-0
复制
发表时间：
2019-05-01
影响因子：
2.4
通讯作者：
Matsuo, Masayuki
中科院分区：
文献类型：
--
作者：
Nagata, Shoma;Goshima, Satoshi;Matsuo, Masayuki
目的比较磁共振胆胰管成像(MRCP)的并行成像(PI)和优化的综合压缩传感技术(原型压缩感知)与常规MRCP方法的优劣。56例患者(男27例，女29例；平均年龄67.2岁)分别接受屏气三维MRCP(BH-MRCP；采集时间23s)、呼吸触发三维MRCP(RT-MRCP；201s)和呼吸触发三维MRCP(RT-MRCP；45s)。计算胰胆管相对对比度(RCS)，进行图像定量分析。两位放射科医生对胰胆管的可见性、胰腺囊性病变、运动伪影和整体图像质量进行了分级，采用五点法进行定性图像分析。结果胆总管、右肝管、左肝管、主胰管在胰头、胰体、胰尾的RC值明显高于RT-MRCP，其次是RT-MRCP和BH-MRCP(P<；0.001)。RT-MRCP对外周RHD和LHD的显示略好于RT-MRCPcs和BH-MRCP(P<；0.001)。结论与常规RT-MRCP相比，RT-MRCP的采集时间明显缩短，但在定量和定性分析上均有显著差异，但差异不大，可通过缩短采集时间来弥补。
PurposeTo assess the combined parallel imaging (PI) and optimized integrated compressed sensing technique (prototype Compressed SENSE) for magnetic resonance cholangiopancreatography (MRCP) compared with conventional MRCP.MethodsThis prospective study was approved by our Institutional Review Board, and all patients provided written informed consent. A total of 56 consecutive patients (27 men and 29 women; mean age 67.2years) underwent breath-hold three-dimensional (3D) MRCP with PI alone (BH-MRCP; acquisition time, 23s), respiratory-triggered 3D MRCP with PI alone (RT-MRCP; 201s) and respiratory-triggered 3D MRCP with Compressed SENSE (RT-MRCPcs; 45s). Relative duct-to-periductal contrast ratios (RCs) of the pancreaticobiliary ducts were calculated for quantitative image analyses. Two radiologists graded the visibility of the pancreaticobiliary ducts, pancreatic cystic lesion, motion artifact, and overall image quality using a five-point rating scale for qualitative image analyses. Theses qualitative and quantitative measurements were then compared among the three sequences.ResultsRCs of the common bile duct, right hepatic duct (RHD), left hepatic duct (LHD), and main pancreatic duct at the pancreatic head, body, and tail segments, were significantly higher RT-MRCP, followed by RT-MRCPcs and BH-MRCP (P < 0.001). The visibility of the peripheral RHD and LHD was slightly better in RT-MRCP than in RT-MRCPcs and BH-MRCP (P < 0.001). The visibility of other pancreaticobiliary ducts, pancreatic cystic lesion, motion artifact, and overall image quality were almost comparable among three sequences.ConclusionThe acquisition time was markedly reduced in RT-MRCPcs compared with conventional RT-MRCP while there were significant differences in both quantitative and qualitative analyses, the differences were small enough that the reduced acquisition time makes up for it.