MR 3D CUBE T_2WI序列对膝关节解剖结构显示的价值

Value of MR 3D CUBE T_2WI Sequence in Displaying Anatomical Structure of Knee Joint

目的探讨MR 3D CUBE T_2WI序列对膝关节解剖结构显示的价值。方法应用GE Signa HDXt 3.0T超导型MR仪和相控阵线圈对病变组和对照组各30例膝关节行常规2D和3D CUBE T_2WI序列扫描,比较两种序列图像显示半月板、前、后交叉韧带和关节软骨的解剖结构情况并进行优、良、差分级评价及统计学分析。结果根据资料分析,3D CUBE T_2WI序列显示前、后交叉韧带和关节软骨方面优于常规2D序列,在半月板的显示方面不及常规2D序列(P均=0.000)。以优、良两级作为满足诊断要求的图像质量评价级别,病变组和对照组于3D CUBE T_2WI序列显示前、后交叉韧带的满意率均达100%,关节软骨对照组为93.33%、病变组为90.00%,而半月板对照组为30.00%、病变组为33.33%。结论膝关节3D CUBE T_2WI序列是一种对关节韧带、关节软骨显示敏感的序列,对于半月板的显示不及常规2D序列,建议结合临床选择使用。

Objective To investigate the value of MR 3D CUBE T2WI sequence in displaying anatomical structure of knee joint. Methods Sixty cases of knee joints （30 cases in lesion group and 30 cases in control group） were scanned with conventional 2D and 3D CUBE T2 WI sequence by HDXt 3.0T superconducting magnetic resonance of GE SigMa imaging system and hased - array coil. The menis- cus, articular cartilage, anterior and posterior cruciate ligaments demonstrated by two sequences were evaluated as excellent, good and poor grade, the results were comparatively analyzed by statistics. Results 3D CUBE T2WI was superior to conventional 2D sequence in displaying of articular cartilage, anterior and posterior cruciate ligaments, and inferior to conventional 2D sequence in displaying of menis- cus（all P = 0. 000）. When we put excellent and good levels of image quality as according with diagnostic requirement. The satisfaction rate demonstrating anterior and posterior cruciate ligaments by 3D CUBE T2WI sequence in lesion and control group were 100% , articular cartilage was 93.33% in control group and 90.00% in lesion group, while the meniscus was 30.00% in control group and 33.33% in lesion group. Conclusion MR 3D CUBE T2WI sequence is a sensitive technique in demonstrating ligaments and articular cartilage of knee joint, but it was inferior to conventional 2D sequence in displaying of meniscus. We should adopt it according to clinical diagnosis.