目的探讨MRI在骨肉瘤诊断中的价值。方法对38例经临床手术病理或活检证实的骨肉瘤MRI影像学资料进行回顾性分析,38例均进行MRI平扫,其中25例平扫后行增强扫描。结果MRI诊断骨肉瘤的准确率达93.9%,肿瘤髓腔内浸润30例,周围软组织侵犯18例,骺板破坏10例,关节软骨受侵4例,尤其是T2加权STIR像和增强扫描在显示上述影像和评价治疗后改变等方面具有较高的敏感性和准确性。结论MRI对骨肉瘤的诊断和临床治疗具有重要意义和价值。 Objective To investigate the value of MRI in the diagnosis of osteosarcoma. Methods Thirty - eight cases of osteosarcoma confirmed by clinical pathology or biopsy were retrospectively analyzed. MRI was performed in all 38 cases, of which 25 cases were followed up by plain scan. Results The accuracy rate of MRI in diagnosing osteosarcoma was 93.9%. There were 30 infiltration in the medullary cavity, 18 infiltration of surrounding soft tissue, 10 cases of epiphyseal plate destruction, 4 cases of articular cartilage invasion, especially T2 weighted STIR and enhanced scan The above images and evaluation of changes after treatment with high sensitivity and accuracy. Conclusion MRI is of great significance and value in the diagnosis and clinical treatment of osteosarcoma.