摘要
目的：探讨膝关节骨坏死的ＭＲＩ表现。材料和方法：３３例患者选自本院门诊及住院病人。男１５例，女１８例。年龄３２～６３岁，平均年龄５０．８岁。所有患者在ＭＲＩ检查前均摄Ｘ线平片。结果：３３例患者３６个膝关节共发现４２处坏死病灶，大多数发生在股骨远端和胫骨平台的软骨下骨。结论：骨坏死的特征性表现为：（１）病变多位于持重关节面的软骨下骨质区。（２）信号强度在Ｔ１ＷＩ和Ｔ２ＷＩ上均呈混杂信号，典型表现为低信号环绕的高信号区。高信号为剥脱下的髓腔脂肪，周边低信号为坏死后修复的纤维化区或营养不良钙化区。骨坏死的各期ＭＲＩ表现与Ｘ线平片和病理学改变相关。
MRIfindingsoftheosteonecrosisofthekneein33patientsselectedfrombothoutpa-tientandinpatientwerestudied.Therewere15menand18women.Theagesofthepatientsrangedfrom32to63years,withanaverageof50.8years.Standardradiographsweretakenforalofthepa-tientsbeforeMRIexamination.42lesionsweredetectedin36kneesofthe33patients.Mostofthele-sionsoccurredinthesubchondralboneofdistalfemoralcondylesandtibialplateaurelatedtoweightbearingsurfaces.ThesignalintensitywasmixedinbothT1WIandT2WI.Theparticularsignalchangewasahighsignalincentralregionsuroundedwithalowsignalinperipheralrim.Thehighsignalcorre-spondedtotheisolatedmarrowfatandthelowsignalrelatedtothefibrosisresultedfromrepairinganddystrophiccalcification.TheMRIfindingsofthedifferentchanges.
出处
《中华骨科杂志》
CAS
CSCD
北大核心
1996年第8期489-491,共3页
Chinese Journal of Orthopaedics
