正常成年男性膝关节囊滑液及关节腔积液的MRI表现

目的:探讨正常膝关节滑膜液的MR表现,为关节囊病变及关节腔积液的诊断提供客观标准。方法:前瞻性研究正常20-35岁膝关节95例,选取以往45例经临床及CT和MR确诊有关节积液病例作为对照组,其中膝关节外伤者13例,骨关节炎27例,类风湿关节炎5例。采用1.5T磁共振行矢状位扫描用T2WI和T2WI抑脂像,分别选取膝关节髌骨中部横切、正中冠状面及正中矢状面图像作为测量层面,每个膝关节测量平面选取关节囊及关节腔液体最大平面测量,测量结果采用独立样本t检验比较测量值间是否有统计学意义。结果:正常成年男性膝关节髌骨中部横切图像关节囊前后最大径测量值与骨关节炎患者相应平面测量结果之间差异有统计学意义(t=7.71,p0.05)。在正中冠状面相应平面测量结果之间差异有统计学意义(t=6.22,p0.05)。正中矢状面髌上囊滑液前后最大径测量结果之间差异有统计学意义(t=9.51,p0.05)。结论:正常成年人膝关节囊滑液及关节腔积液MRI可定量诊断,为骨性关节炎关节积液的诊断提供客观依据。

MR Imaging of Normal Adult Male Knee Synovia and Joint Effusion

Purpose： To study the MRI performance of normal knee joint synovial fluid, To provide an objective criterion for the diagnosis of the disease of the joint capsule and joint effusion. Material and Methods： A prospective study of 95 cases of normal adult knees, the age from 20 to 35 years. Select the previous 45 cases of joint effusion as a control group, which is diagnosed by clinical and CT. The control group includes knee injuries in 13 cases, 27 cases of osteoarthritis, rheumatoid arthritis five cases. All cases has accepted the scan of sagittal T2WI and T2WI with fat suppression images in MRI of 1. 5 T. We selected the centre of cross-section, coronal and sagittal in the patella as a measurement level. Meanwhile, measurement plane should be the biggest plane of the knee joint capsule and articular cavity fluid. The independent sample test is used to evaluate the statistical difference of measurement results ： There is the statistically significant difference between the normal adult male and the patients with osteoarthritis in measurement results from the maximum anteroposterior diameter of the joint capsule, the centre of cross-section in the patella（t = 7. 71, p 〈 0. 05 ）. We also find the statistically significant difference of measurement results in the middle of coronal plane between the normal adult male and the patients with osteoarthritis（ t = 6. 22, p 〈 0. 05 ）. There is the statistically significant difference between the normal adult male and the patients with osteoarthritis in the measurement results in the maximum diameter of bursa suprapatellaris at the sagittal plane patellar（ t = 9. 51, p 〈 0. 05 ）. Conclusion： MRI can quantitative diagnosis the normal adult knee joint Synovial Fluid and joint effusion. MRI can provide an objective basis for the diagnosis of osteoarthritis joint effusion.