21例骶骨翼伪似骨破坏的CT诊断  

21 Cases of CT Diagnosis of Pseduo-destrauction Sacral Wing

作　　者：曹存友 陈义财 赵志贤[1] 

机构地区：[1]自贡市第二人民医院,四川自贡643010

出　　处：《实用医技杂志》2008年第18期2344-2346,共3页Journal of Practical Medical Techniques

摘　　要：目的:探讨骶骨翼假性破坏的形成机制及表现以减少误诊。方法:对21例骶骨翼假性破坏病例行1mm～2mm薄层扫描或扫描后1mm～2mm薄层重建,并行MPR,SSD等重建,观察骶骨翼假性破坏的CT表现及其周围骨质情况。随机抽取160例腰骶椎轴位扫描病人统计骶骨翼假性骨破坏的出现率。结果:160例腰骶椎轴位扫描中有4例出现骶骨翼假性破坏(2/120,1.67%)。21例骶骨翼见不均质性密度增高影,骨小梁结构模糊不清。1mm～2mm薄层扫描或重建及MPR、SSD重建后,病变不明显,髓腔密度同对侧比较基本正常。13例骶骨翼后缘皮质局限性缺省,凹面向后,边缘硬化。结论:骶骨翼假性破坏主要是由于部分容积效应所致。薄层扫描是消除该假象的主要方法。骶后缘局限性骨质缺损为重要的鉴别征象。Objective To explore the formation mechanism and CT features of pseduo-destruction in sacral wing and to reduce misdiagnosis.Mathods 21 cases with pseduo-destruction sacral wing been done 1 mm-2 mm thin slice scan and reconstraction,include MPR, SSD et al.Observed sacral wing surface and the surrounding circumstances.Random sampling 160 cases with L-spine axiel scan,accounted appearance rates of sacral wing pseduo-destruction.Results In 160 cases there were 4 cases appeared pseduo-destrauction in sacral wing.21 cases cacral wing pseduo-damage performance not homogeneous area increased density,trabecular hone vague,13 cases limitations sacral edge cortical defect.Conclusion Sacral wing pseduo-damage was mainly due to partial volume effect,Thin-slice scan is principal means to remove the false impression, Sacral edge cortical limitation defect is a important sign for identification.

关 键 词：骶骨翼 解剖 伪影 部分容积效应 薄层扫描 计算机体层摄影 

分 类 号：R816.8[医药卫生—放射医学]