影响全身弥散技术成像效果的因素  

Factors Affecting Whole Body Diffusion-weighted Imaging

作　　者：杨永贵[1] 郭岗[1] 郑晔[1] 许晓金[1] 

机构地区：[1]福建医科大学教学医院厦门市第二医院医学影像科,福建厦门361021

出　　处：《汕头大学医学院学报》2009年第3期150-152,F0003,共4页Journal of Shantou University Medical College

摘　　要：目的:分析影响全身弥散加权成像技术(WBDWI)成像效果的因素。方法:回顾性分析44例WBDWI受检者资料,评价不同因素的图像效果。结果:金属异物、人体组织自身磁敏感差异大、受检者身体长轴不在同一水平面、无匀场及涡流校准导致图像变形,拼接错层,与对照组比有统计学意义(P<0.001,P<0.005)。结论:磁敏感伪影是上述4种影响WBD-WI图像质量的最大因素。Objective： To analyze factors affecting whole body difffusion-weighted imaging（WBDWI）. Method： The data of 44 subjects performed WBDWI were retrospectively analyzed to evaluate the imaging quality by factors. Results： The metal foreign body, the different sensitivity of magnetic susceptibility of body tissues, the long axis of the body in different horizontal plane and lacking of pre-scan shimming and eddy current calibration resulted in distortion and split-level on the image. Conclusion： The susceptibility artifact is the greatest factor affecting the imaging quality of WBDWI for the above 4 factors.

关 键 词：全身弥散加权成像 磁敏感 均匀度 伪影 

分 类 号：R445.2[医药卫生—影像医学与核医学]