【摘要】 目的:探讨MRI在剥脱性骨软骨炎(OCD)诊断中的价值。方法:回顾性分析15例经膝关节镜及手术证实的剥脱性骨软骨炎MRI影像资料。评价剥脱性骨软骨炎的MRI特点。结果:15例OCDMRI表现为关节持重部位软骨下骨质缺损区。5例为T1低信号,T2低信号灶。8例为T1低信号、T2高信号。2例为T1低信号、T2等信号。病灶周缘呈低信号环绕。关节软骨变薄、粗糙,部分中断、缺如。与关节镜检查结果一致。结论:OCD在MRI有特征性表现,MRI对其可作出明确诊断。更多还原

【Abstract】 Objective: To evaluate MRI in the diagnosis of osteochondritis dissecans. Methods: Fifteen cases with osteochondritis dissecans proved by arthroscopy and surgery were reviewed and analyzed. MRI features were evaluated. Results: The femoral condyle was the most commonly affected location in the knee, it occurred in all the patients. Five cases had low signal on T1WI and T2WI. Eight cases showed low signal on T1WI or high signal on T2WI. Two cases showed low signal on T1WI and intermediate signal on T2WI. The edges of the lesion were surrounded by low signal. The subchondral plate disappeared or became thinner. Interruption or disappearance of the hyaline cartilage could be seen occasionally. The result of MRI is the same as seen in arthroscopy. Conclusion: Osteochondritis dissecans has specific manifestations in MRI. It has certain value in diagnosing osteochondritis dissecans.更多还原