摘要
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。
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 normal bone marrow or slight edema or hemorrhage on MRI. In subacute stage,the infarction was manifested as iso-or slight low-signal on T1WI and iso- or slight high-signal on T2WI in center areas. A low-signal zone around was separated from the normal marrow with linear T1 low-signal and T2 high-signal in both acute and subacute stages. In chronic stage,the lesion was characterized by low-sig- nal on both T1WI and T2WI,indicating the formation of fibrosis and dystrophic calcification ...更多due to the replacement of necrotic tissue by granulation and fibrous tissue. Conclusion：MRI is a good method of early detection and correct diagnosis due to its high sensitivity and characteristic imaging features.
出处
《南京医科大学学报（自然科学版）》
CAS
CSCD
北大核心
2010年第2期203-205,共3页
Journal of Nanjing Medical University(Natural Sciences)
关键词
骨梗死
MRI
CT
X线平片
bone infarction
magnetic resonance imaging
computed tomography
radiography
