兔眼球后非磁性异物CT和MRI诊断  

An experimental study of CT and MRI in retroocular nonmagnetic foreign bodies in rabbits

作　　者：任翠萍[1,2] 程敬亮[1,2] 齐云秋 姜曦[1,2] 李树新[1,2] 张效房[1,2] 管生[1,2] 

机构地区：[1]河南医科大学第一附属医院放射科 [2]河南医科大学第一附属医院眼科

出　　处：《河南医科大学学报》1998年第2期13-14,共2页Journal of Henan Medical University

基　　金：河南省科技攻关项目

摘　　要：将３５枚非磁性异物（金属异物８枚，非金属异物２７枚。异物大小为２ｍｍ×１．５ｍｍ×１．５ｍｍ～９ｍｍ×６ｍｍ×１ｍｍ）置入２２只兔眼球后肌锥内行ＣＴ和ＭＲＩ检查，探讨ＣＴ和ＭＲＩ对眼球后异物的诊断价值。结果：ＣＴ、ＭＲＩＴ１ＷＩ、Ｔ２ＷＩ和Ｆｌａｓｈ２ｄ序列眼球后异物检出阳性率分别为８９％（３１／３５）、９７％（３４／３５）、８６％（３０／３５）和１００％；ＣＴ上３枚干木异物密度低于球后脂肪，２８枚呈高密度而被确定，４枚塑料ＣＴ未显示；ＭＲＩＴ１ＷＩ漏检１枚青枝柳条；ＭＲＩ球后异物多呈低信号。结果提示：ＣＴ和ＭＲＩ均为检出眼球后异物的有效检查。? To evaluate CT and MRI value in diagnosing retroocular nonmagnetic foreign bodies,35 retroocular foreign bodies of 22 rabbits were scanned by CT and MRI.Of 35 retroocular foreign bodies,8 were metallic and 27 were nonmetallic.Their size ranged from 2 mm×1.5 mm×1.5 mm to 9 mm×6 mm×1 mm.The diagnostic positive rates of CT,T1WI,T2WI and Flash2d in 35 retroocular foreign bodies were 89%,97%,86% and 100% respectively.In addition,3 dry wooden foreign bodies showed lower density than retroocular fat,28 showed higher density and 4 plastic foreign bodies were undetected on CT.One fresh willow of 35 retroocular foreign bodies wasn't found on T1WI of SE sequence.Most of retroocular foreign bodies were hypointensity on MRI.Our results demonstrated that CT or MRI was an effective method for picking up retroocular foreign bodies,T1WI of SE sequence or Flash2d sequence was a choice sequence of MRI in detecting retroocular foreign bodies.

关 键 词：眼异物 眼球后异物 CT 诊断 磁共振成像 

分 类 号：R779.140.4[医药卫生—眼科] R445.2[医药卫生—临床医学]