眼眶内木质异物CT和MRI诊断  

CT and MRI of intraorbital wooden foreign bodies

作　　者：程敬亮[1,2] 岳松伟[1,2] 任翠萍[1,2] 齐云秋 高剑波[1,2] 姜曦[1,2] 施光普[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21-24,共4页Journal of Henan Medical University

基　　金：河南省科技攻关项目

摘　　要：将１６枚兔眶内木质异物和３例（４枚）患者眶内木质异物的ＣＴ和ＭＲＩ资料进行比较分析，探讨ＣＴ和ＭＲＩ对眶内木质异物的诊断价值。１６枚兔眶内木质异物包括干杨木块５枚、干竹片６枚、青枝柳条５枚，异物大小为１．５ｍｍ×１ｍｍ×１ｍｍ～９ｍｍ×４．２ｍｍ×４．２ｍｍ，埋置异物后２ｈ内完成ＣＴ和ＭＲＩ。３例患者４枚异物中２枚为木块，２枚为竹签，大小为３ｍｍ×２ｍｍ×１ｍｍ～２５ｍｍ×７ｍｍ×７ｍｍ。伤后至ＣＴ、ＭＲＩ检查时间为２０～６０ｄ。结果：１６枚兔眶内异物ＣＴ检出１２枚，ＣＴ值介于－１４５～６３．８Ｈｕ；ＭＲＩＳＥ序列Ｔ１ＷＩ、ＰＤＷＩ和Ｔ２ＷＩ分别检出１１枚、８枚和１６枚，Ｆｌａｓｈ２ｄ序列全部检出；３例患者４枚异物ＣＴ仅检出１枚，ＭＲＩ全部检出。结果提示：ＭＲＩ诊断眶内木质异物优于ＣＴ，ＭＲＩＳＥ序列Ｔ２ＷＩ和Ｆｌａｓｈ２ｄ序列是检出眶内木质异物的优选序列；お? A preliminary investigation of 16 pieces of intraorbital wooden foreign bodies in rabbits and 4 pieces in 3 eyes traumatic patients was carried out by CT and MRI.The experimental inserted foreign bodies included 5 pieces of dry poplar,6 pieces of bamboo and 5 pieces of fresh willow.Their sizes were from 1.5 mm×1 mm×1 mm to 9 mm×4.2 mm×4.2 mm.CT and MRI were performed within 2 hours after the foreign bodies were implanted.There were 2 pieces of wooden and 2 pieces of bamboo in the 4 injured eyes from 3 patients which ranged from 3 mm×2 mm×1 mm to 25 mm×7 mm×7 mm in size.CT and MRI were carried out 20～60 days after the traumas.The results showed that 12 out of 16 experimental foreign bodies from rabbits were discovered by CT,and CT attenuation value was from -145 to 63.8 Hu. All the intraorbilal foreign bodies of rabbits were picked up by Flash2d sequence or T2WI of SE sequence on MRI,but only 11 and 8 pieces by T1WI and PDWI of SE sequence respectively.Only one out of 4 foreign bodies from 3 patients was discovered by CT,while all of them were picked up by MRI.The findings sugges that MRI is superior to CT in the diagnosis of intraorbital wooden foreign bodies,and Flash2d sequence and T2WI of SE sequence should be the choice sequence.Since long lasting wooden foreign body of the eye may resorb water from its environment,this leads to an increasement of its density on CT and signal intensity on MRI.

关 键 词：眼异物 木质异物 CT 磁共振成像 

分 类 号：R779.140.4[医药卫生—眼科] R816.97[医药卫生—临床医学]