兔眼玻璃体内自体睫毛异物磁共振成像研究

目的 探讨磁共振成像技术在检出及诊断兔眼玻璃体内自体睫毛异物的应用.方法 24只实验动物右眼玻璃体内均植入直径0.2～0.3 mm,长10 mm的自体睫毛5根,所有实验动物均于术后2 h分别行兔眼不做任何处理及双眼表面覆盖湿润纱布+2%利多卡因球后注射麻醉2种方法MRI检查.结果 24只实验动物在兔眼不做任何处理MRI检查T_2WI上仅有6只实验动物显示右眼玻璃体内自体睫毛异物,而兔眼表面覆盖湿润纱布+2%利多卡因球后注射麻醉后MRI检查T_2WI,则在17只实验动物患眼中检出自体睫毛异物.结论 兔眼表面覆盖湿润纱布+2%利多卡因球后注射麻醉的运动伪影及磁敏感性伪影抑制方法有助于玻璃体内睫毛异物的检出及诊断.

An Experimental Investigation of Autologous Lashes Foreign Body within abbit Vitreous Body with MR Imaging

Objective To evaluate the value of MR imaging in diagnosing autologous lashes within rabbit vitreous body.Methods 5 lashes were placed into the right vitreous bodys in 24 experimental animals.All of the experimental animals underwent MRI examination with and without overlying moist swab and 2% lidocaine retrobulbar anesthesia after operations 2 hours later.Results The intravitreous lashes could be demonstrated on T_2WI in 6 animals and 17 animals without and with overlying moist swab and 2% lidocaine retrobulbar anesthesia,respectively.Conclusion The methods of artifacts-suprresing is useful for diagnosing intravitreous lases foreign body within rabbits at MR imaging examination.