目的分析腰椎骨质增生MRI信号类型和CT结构特点间的对应关系，探讨腰椎退变椎体重塑的可能机制。方法回顾性分析2011年7月至2012年1月在该院同时行腰椎MRI和CT检查的45例受检者的影像学资料，CT数据行容积再现（VR）和多平面重组（MPR）观察骨质增生结构特点，记录腰椎有无骨质增生形成、骨质增生MRI信号类型和CT表现，并分析二者之间的关系。结果45例受检者的225个椎体中，38个椎体有肉眼可见骨质增生形成，其MRI信号Ⅰ型2个（5．3％）、Ⅱ型4个（10．5％）、Ⅲ型10个（26．3％）和Ⅳ型22个（57．9％）；CT骨质增生结构特点A型4个（10．5％）、B型11个（28．9％）和C型23个（60．5％）；A型骨质增生MRI信号全为Ⅱ型（100％），B、C型骨质增生MRI信号多为Ⅳ型（分别72．7％和65．2％）。结论腰椎骨质增生不同MRI信号类型和CT结构特点间存在对应关系，骨质增生不断塑形完成腰椎退变时椎体重塑过程。%Objective To investigate the relationship between MRI signal type and CT structural characteristics on lumbar hy-perostogeny ,and the possible mechanism of vertebral body remodeling on degenerative lumbar spine .Methods Imaging data of for-ty-five subjects who were referred for both MRI and CT imaging of the lumbar spine from July 2011 to January 2012 were retro-spectively analyzed .Volume Rendering(VR) and Multi-Planar Reformation(MPR) were used to observe structural characteristics of osteophyte .Osteophyte formation ,MRI signal type and CT features of osteophyte were recorded ,then analyzed their relationship . Results 45 subjects contain 225 vertebral bodies ,there were 38 vertebral bodies containing osteophyte visible to naked eye .The four types of MRI signal were type Ⅰ to type Ⅳ ,accounting for 2(5 .3% ) ,4(10 .5% ) ,10(26 .3% ) and 22(57 .9% ) ,respectively . The three types of CT structural characteristics are type A to type C ,accounting for 4(10 .5% ) ,11(28 .9% ) and 23(60 .5% ) ,re-spectively .The main MRI signal of type A is type Ⅱ(100% ) ,and that of type B and C are both type Ⅳ(72 .7% and 65 .2% ) .Con-clusion There is a corresponding relation between MRI signal type and CT structural characteristics on lumbar hyperostogeny . Constant reconstruction of osteophyte remodels vertebral body on degenerative lumbar spine .
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