基于压缩感知技术的3D-MRCP在胆道梗阻中显示胆管扩张情况的应用价值  

Application value of 3D-MRCP based on compressed sensing technology to display bile duct dilatation in biliary obstruction

作　　者：马培旗 袁玉山 张磊 张杨 彭彬 张宗夕 MA Peiqi;YUAN Yushan;ZHANG Lei;ZHANG Yang;PENG Bin;ZHANG Zongxi(Department of Imaging Center,Fuyang People's Hospital,Fuyang 236000,China)

机构地区：[1]安徽省阜阳市人民医院影像中心,安徽阜阳236000

出　　处：《中国中西医结合影像学杂志》2024年第6期725-728,共4页Chinese Imaging Journal of Integrated Traditional and Western Medicine

基　　金：阜阳市自筹经费科技计划项目(FK202081049)。

摘　　要：目的:探索基于压缩感知(CS)技术的三维磁共振胰胆管成像(3D-MRCP)在胆道梗阻中显示胆道扩张情况的应用价值。方法:回顾性分析57例胆道梗阻患者的术前常规MRCP、CS-MRCP和屏气CS-MRCP图像。57例中,恶性肿瘤22例,胆管结石或炎症29例,胆总管囊肿6例。比较3种扫描方式的扫描时间及客观评价指标(SNR、CNR);并由2位高年资诊断医师采用双盲法根据5级李克特量表对3种图像进行主观评价。根据呼吸频率幅度,分为呼吸平稳组31例和呼吸不平稳组26例,比较2组内不同扫描方式图像质量主观评价结果。结果:57例均表现为不同程度胆管扩张。常规MRCP、CS-MRCP和屏气CS-MRCP扫描时间分别约4 min 6 s、1 min 42 s、18 s。3种扫描方式SNR、CNR比较,差异均有统计学意义(均P<0.05)。2位医师主观评价一致性较好(K=0.951)。3种扫描方式主观评价结果差异均有统计学意义(P<0.001);呼吸平稳组3种扫描方式主观评价结果差异有统计学意义(P<0.001),其中常规MRCP和CS-MRCP均大于屏气CS-MRCP组(均P<0.05);呼吸不平稳组3种MRCP扫描方式主观评价结果差异均有统计学意义(P<0.001),其中屏气CS-MRCP均大于CS-MRCP和常规MRCP(均P<0.05)。结论:基于CS技术的3D-MRCP可很好地显示胆道梗阻患者胆管扩张情况,大大缩短扫描时间;对呼吸不平稳者,可优先选择屏气CS-MRCP。Objective:To explore the application value of 3D-MRCP based on compressed sensing(CS)technology to display bile duct dilatation in biliary obstruction.Methods:The conventional MRCP,CS-MRCP and breath-holding CS-MRCP images of 57 patients with biliary obstruction were retrospectively analyzed.Among the 57 patients,22 cases were malignant tumors,29 cases were bile duct stones or inflammation,and 6 cases were bile duct cysts.The scanning time and objective evaluation indexes(SNR,CNR)of the three scanning methods were compared.At the same time,two senior radiologists used double-blind method and 5-level Likert scale for subjective evaluation of images of the three scanning methods.The subjects were divided into a stable breathing group(31 cases)and an unstable breathing group(26 cases)according to the range of breathing frequency,and the subjective evaluation of image quality of three scanning methods was compared between the two groups.Results:57 patients showed varying degrees of bile duct dilatation.The scanning time of the conventional MRCP,CS-MRCP and breath-holding CS-MRCP was about 4 min 6 s,1 min 42 s and 18 s,respectively.SNR and CNR between the three methods were statistically significant(all P<0.05).The consistency of subjective evaluation of the two senior radiologists was better(K=0.951).The subjective evaluation results of the three scanning methods showed statistically significant differences(P<0.001).For the stable breathing group,the subjective evaluation results of the three scanning methods showed statistically significant difference(P<0.001),and the subjective evaluation of the breath-holding CS-MRCP method was lower than that of the CS-MRCP and the conventional MRCP methods(both P<0.05).While for the unstable breathing group,the subjective evaluation results of the three scanning methods showed statistically significant difference(P<0.001),and the subjective evaluation of the breath-holding CS-MRCP method was higher than that of the CS-MRCP and the conventional MRCP methods(both P<0.05).Conclusio

关 键 词：压缩感知技术 磁共振胰胆管成像 胆道梗阻 

分 类 号：R445.2[医药卫生—影像医学与核医学] R575.7[医药卫生—诊断学]