Gross J G, Hesselink J R, Press G A, Goldbaum M H, Freeman W R
Department of Ophthalmology, University of South Carolina School of Medicine, Columbia 29203.
Am J Ophthalmol. 1990 Oct 15;110(4):366-70. doi: 10.1016/s0002-9394(14)77016-3.
Media opacification in eyes filled with silicone oil makes the evaluation of recurrent retinal detachment difficult. Ultrasonography through silicone oil is subject to significant imaging artifacts. We performed magnetic resonance imaging on six patients with unilateral intravitreal silicone oil to determine if the technique would detect detached retina and subretinal oil. All patients had undergone pars plana vitrectomy with silicone oil injection for proliferative vitreoretinopathy; five patients had encircling solid silicone scleral buckles. In five patients the media were clear, and ophthalmoscopic findings were correlated with magnetic resonance findings. Four patients had recurrence of inferior retinal detachment; magnetic resonance imaging demonstrated subretinal oil in three of these patients. One patient had a concentric, shallow, anterior retinal detachment; magnetic resonance scanning demonstrated a globular hyperintensity suggestive of subretinal oil. In the sixth patient, who had an opaque cornea, magnetic resonance imaging suggested that the retina was attached preoperatively; this was confirmed at subsequent surgery. A chemical shift artifact was helpful in defining the contour of retinal detachments and the presence of subretinal oil by outlining the silicone oil within the eye.
充满硅油的眼中介质混浊会使复发性视网膜脱离的评估变得困难。通过硅油进行超声检查会出现明显的成像伪影。我们对6名单侧玻璃体内注入硅油的患者进行了磁共振成像，以确定该技术是否能检测出视网膜脱离和视网膜下油。所有患者均因增生性玻璃体视网膜病变接受了玻璃体切割联合硅油注入术；5例患者有环形固体硅胶巩膜扣带术。5例患者的介质清晰，眼底镜检查结果与磁共振成像结果相关。4例患者发生下方视网膜脱离复发；磁共振成像显示其中3例患者有视网膜下油。1例患者有同心性、浅层、前部视网膜脱离；磁共振扫描显示一个球形高信号，提示视网膜下油。在第6例角膜混浊的患者中，磁共振成像提示术前视网膜已附着；随后的手术证实了这一点。化学位移伪影通过勾勒眼内硅油轮廓，有助于确定视网膜脱离的轮廓和视网膜下油的存在。
