兔眼玻璃体内积血和积气的CT和MRI表现  

An experimental observation of intravitreous hemorrhage and pneumatocele on CT and MRI in rabbits

作　　者：程敬亮[1,2] 齐云秋 李树新[1,2] 姜曦[1,2] 任翠萍[1,2] 王文战[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24-27,共4页Journal of Henan Medical University

基　　金：河南省科技攻关项目

摘　　要：在２只兔的４只眼玻璃体内注入空气和自体血，利用ＣＴ和和ＭＲＩ观察其变化。２只眼玻璃体内分别注入空气０．３ｍｌ和０．５ｍｌ，另２只眼玻璃体内分别注血０．１ｍｌ和０．５ｍｌ。注血注气后分别在１ｈ内、３ｄ、７ｄ、１４ｄ和２８ｄ行ＣＴ和ＭＲＩ。结果：眼玻璃体内积气ＣＴ图像呈极低密度，ＭＲＩ各扫描序列呈极低信号，７ｄ时ＣＴ和ＭＲＩ未发现眼内有积气影像；眼玻璃体内积血１ｈ内和３ｄＣＴ图像呈略高密度，７ｄＣＴ图像未发现玻璃体有异常密度。ＭＲＩＴ１ＷＩ玻璃体出血均呈相对高信号，ＰＤＷＩ、Ｔ２ＷＩ和Ｆｌａｓｈ２ｄ序列玻璃体信号增高，可隐没某一时期出血，２８ｄＭＲＩ仍可见玻璃体出血。结果提示：ＣＴ和ＭＲＩ均为检出眼玻璃体内积气和积血的有效方法；ＭＲＩ诊断玻璃体内出血特别是亚急性期和慢性期出血优于ＣＴ。? Injection of air and autoblood into 4 vitreous bodies of 2 rabbits were performed respectively.The pathological changes were monitored by CT and MRI respectively.CT and MRI were carried out 1 hour,and 3,7,14 and 28 days after injection of air or blood.Intravitreous air bubbles showed very low density on CT and very low signal intensity on MRI,regardless of the MR sequences selected.After 7 days of followup study,the air bubbles were no more discovered by CT or MRI.Intravitreous blood showed slight high density on CT within 3 days,but disappeared on day 7.All intravitreous body blood showed relatively high signal intensity on T1WI of MRI,even after 28 days of followup study,but it may be concealed by the high signal intensity of the vitreous body while PDWI,T2WI or Flash2d sequences were performed.The results revealed that CT and MRI were all useful for the evaluation of intravitreous hemorrhage and pneumatocele;however,MRI seemed to be superior to CT in the evaluation of intravitreous blood,especially in its subacute and chronic stages,and T1WI was the best sequence of choice.

关 键 词：眼出血 眼损伤 磁共振成像 玻璃体内出血 CT 

分 类 号：R779.120.4[医药卫生—眼科] R816.97[医药卫生—临床医学]