正常成人髋关节软骨厚度的MRI测量研究

To Measure the Articular Cartilage Tickness of the Normal Adult Hip Joint Using MRI

目的通过对正常成人髋关节不同部位软骨厚度的MR测量值分析,明确正常成人髋关节软骨的分布特征。方法选择健康成年志愿者30例(共60髋),年龄范围23-54岁,平均年龄37.7岁,应用3.0T磁共振3D-FS-SPGR序列进行双髋关节轴位扫描。利用MPR得到股骨头正中冠状面图像,选取4个测量点即冠状位-45°、冠状位45°、冠状位90°和冠状位135°进行软骨厚度测量,对不同位置所测关节软骨厚度进行比较,并对髋关节软骨厚度与受检者年龄、身高、体重进行相关分析。结果髋关节软骨厚度分布不均匀,冠状位-45°、冠状位45°、冠状位90°和冠状位135°髋关节软骨厚度分别为1.380±0.077mm、1.645±0.094mm、1.640±0.094mm、1.350±0.089mm;四个测量点之间软骨厚度差异有统计学意义(F=65.473,P=0.000)。冠状位-45°与45°、冠状位-45°与90°、冠状位135°与45°、冠状位135°与90°两两之间软骨厚度比较,差异有统计学意义(P<0.01);余两两之间软骨厚度差异无统计学意义(P>0.05)。髋关节软骨厚度与年龄、身高、体重无相关性,r=-0.005、-0.321、-0.255(P>0.05)。结论正常成人髋关节负重区和非负重区软骨厚度不同,负重区髋关节软骨较非负重区厚。健康成人髋关节软骨厚度与年龄、身高、体重无相关关系。

Objective To clarify the distribution characteristics of normal adult hip cartilage through analyzing the cartilage-thickness. Methods Methods 30 healthy adult volunteers, age from 23 to 54 years（mean 37.7 years）, were scanned at 3.0T MR with 3D-FSSPGR sequence. Four points, including coronal-45°、coronal 45°、coronal 90°、coronal 135°, which were got from the middle coronal images of the femoral head by MPR, were selected to measure the thickness of cartilage. Results The cartilagethickness of the hip were inhomogeneously, being respectively 1.380±0.077mm、1.645±0.094mm、1.640±0.094 mm and 1.350±0.089 mm for coronal-45°、45°、90° and 135°. There was a significantly difference among 4 points（F=65.473, P=0.000）： between coronal-45°and 45°、coronal-45°and 90°、coronal135°and 45°, also coronal135°and 90°（P〈0.01）. There was no correlation between age or height or weight and the cartilage-thickness, the correlation coefficient being respectively r=-0.005、-0.321、-0.255（P〈0.05）. Conclusion The cartilage-thickness of the normal hips were different between weight-bearing area and non-weight-bearing area. The cartilage of weight-bearing area was thicker. There was no correlation between age or height or weight and the thickness of the normal adult hip cartilage.