膝关节自发性软骨下骨坏死的MRI诊断

MRI Diagnosis of Spontaneous Subchondral Osteonecrosis of Knee Joint

目的:探讨MRI对膝关节自发性软骨下骨坏死的诊断价值。方法:回顾性分析22例(31个膝关节)膝关节自发性软骨下骨坏死患者的病例资料。所有病例均行X平片和MRI检查,其中8个膝关节同时进行CT检查。结果:X线平片显示无病灶膝关节28个,病灶膝关节3个,显示率9.7%。CT扫描8个膝关节中,显示6个病变膝关节,显示率75%。MRI检查出所有膝关节病灶,检出率100%。结论:MRI是膝关节自发性软骨下骨坏死最佳的影像学检查方法,发现骨坏死的敏感性极高,有助于临床诊断和及时治疗。

Objective： To investigate the diagnostic value of MRI for the spontaneous subchondral osteonecrosis in knee joint. Methods： 22 patients （31 knee joints） with spontaneous subchondral osteonecrosis underwent radiography and MRI examination, of which,CT were undertaken in 8 joints simultaneously. All of the materials were analyzed retrospectively. Results：Of the 31 knee joints having radiography,no abnormality was assessed in 28 joints,abnormalities were found in 3 joints,the detectability of radiography was 9.7%. Axial CT scan with reconstructed images after volumetric scanning in 8 joints,abnormalities were detected in 6 （75%）. The detectability of MRI was 100%. Conclusion： MRI is the modality of choice for the diagnosis of spontaneous subchondral osteonecrosis with the highest diagnostic sensitivity, which is helpful for clinical diagnosis as well as treatment in time.