敏感性编码技术在肝脏磁敏感成像中应用的参数优选探讨  

Application of Sensitivity Encoding Technique with Optimal Parameters for Susceptibility Weighted Imaging in the Liver

作　　者：李秋云[1] 肖恩华[1] 李华兵[1] 贺忠[1] 陈炜[2] 

机构地区：[1]中南大学湘雅二医院放射科,长沙410011 [2]湖南省脑科医院

出　　处：《临床放射学杂志》2011年第9期1293-1296,共4页Journal of Clinical Radiology

基　　金：十一五国家科技计划项目(2007BAI05B06);国家自然科学基金(30070235;30470508;30870695);湖南省自然科学基金重点项目(06JJ20081);湖南省自然科学基金项目(07JJ6040)

摘　　要：目的探讨敏感性编码(SENSE)技术应用于肝脏磁敏感成像(SWI)中的最佳扫描参数。资料与方法对20名成年健康自愿者行肝脏SWI,比较不同SENSE因子及激励次数(NEX)对图像质量的影响。SENSE因子分别取1.0、1.5、2.5、3.5,NEX分别取1、2、3。结果在不同参数的比较中,SENSE因子为1.5的图像质量较好,NEX为1的图像质量较好。结论应用SENSE技术能显著缩短扫描时间,SENSE为1.5、NEX为1是肝脏SWI较好的扫描参数。Objective To evaluate optimal parameters of sensitivity encoding technique for susceptibility weighted imaging in the liver.Materials and Methods SWI of the liver was performed in 20 healthy adult volunteers.Different parameters included SENSE factor and number of excitation.SWI in liver was performed with different factor of SENSE including 1,1.5,2.5 and 3.5;and different number of excitation including 1,2,3.Results Image quality of SWI with SENSE of 1.5 was better than that with 1,2.5 and 3.5.SWI with 1 excitation showed higher quality than that with 2 and 3.Conclusion SENSE technique can singnificantly shorten scan time.SWI with SENSE factor 1.5 and 1 excitation are the optimal parameters in SWI of the liver.

关 键 词：肝脏 敏感性编码 磁敏感成像 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学]