骨梗死的影像学表现

目的:探讨骨梗死的影像学特点。方法:对l3例累及44处骨骼的骨梗死患者进行X线、CT及MRI检查,将骨梗死分为早、中、晚期,分析其影像学特征。结果:病变主要累及股骨下端和胫骨上端,呈双侧对称发病。骨梗死X线、CT表现为阴性或不典型局部斑点状钙化,MRI表现为早期病灶中心基本等同于正常骨髓信号,或者为轻度水肿、出血的信号特点;中期病变中心T1WI呈等或稍低信号,T2WI呈等或稍高信号,早中期周边线样影均呈长T1长T2改变;晚期病灶中央信号不均匀减低,周边线样影均呈低信号改变。结论:MRI显示骨梗死敏感而且其影像学表现有特征性,是早期检测和正确诊断的最佳方法。

Imaging findings of bone infarction

Objective:To discuss the imaging features of bone infarction. Methods:Radiography,CT and MRI were performed in 13 patients with 44 bone infarctions. The imaging findings were analyzed to classify the lesions into acute,subacute and chronic stages. Results:The lesions mainly involved in the distant segments of femur and proximal segments of tibia on both sides. Bone infarction appeared negative or atypical patchy calcification on both radiography and CT. In acute stage, the center area of lesions presented n...