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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，Ｔ１ＷＩ是检出玻璃体出血的优选序列
Air and autologous blood were injected into the vitreous of 4 eyes of 2 rabbits, and their changes were observed by CT and MRI. The two eyes were injected with 0.3ml and 0.5ml of air into the vitreous respectively, and the other 2 eyes were injected with 0.1ml and 0.5ml intravitreal respectively. After injection of blood, the CT and MRI were performed within 1h, 3d, 7d, 14d and 28d respectively. Results: The CT images of the vitreous in the vitreous showed a very low density, and the MRI scan sequences showed extremely low signal. On the 7th day, no intraluminal pneumoperitoneum images were found on the CT and MRI images. The intravitreal vitreous hemorrhage within 1 h and the 3DCT images were slightly higher Density, 7dCT images did not find abnormal density of vitreous. MRIT1WI vitreous hemorrhage were relatively high signal, PDWI, T2WI and Flash2d sequence vitreoretinal signals increased, can hide a period of bleeding, 28dMRI can still be seen vitreous hemorrhage. The results suggest that both CT and MRI are effective methods for the detection of intravitreal vitreous hemorrhage and hemorrhage. MRI diagnosis of intravitreal hemorrhage, especially subacute and chronic hemorrhage, is superior to CT, and T1WI is the preferred sequence for detecting vitreous hemorrhage