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一、前言出血进入眼后段能够引起多种结构异常,标准化超声扫描能探查出所有肉眼不可见的异常结构并可区分其大多数的性质。B型超声扫描,特别是接触式B型超声扫描,在估计玻璃体视网膜情况中起重要作用,这种高分辨B型超声扫描的优点是能提供病变的形态和局部解剖图,然而B型超声扫描常不能测出弥漫性尘样玻璃体混浊,也不能有把握地把视网膜脱离与致密的纤维血管膜相鉴别,这种纤维血管在形状、声学密度、活动性以及附着于眼底等方面与视网膜脱离十分相似。由于这些缘故,标准化A型超声扫描和接触
First, the introduction of bleeding into the posterior segment can cause a variety of structural abnormalities, standardized ultrasound scan can detect all the naked eye can not see the abnormal structure and can distinguish the nature of most of them. B-mode ultrasound scanning, especially contact B-mode ultrasound scanning, plays an important role in estimating vitreoretinal conditions. The advantage of this high-resolution B-mode ultrasound scan is that it provides morphological and anatomical maps of the lesion. However, B-mode ultrasound scans Often can not detect diffuse dust-like vitreous opacity, can not be sure to distinguish the retinal detachment and dense fibrous vascular membrane, the fiber in the shape, acoustics density, activity and attached to the fundus and so detachment is very similar. For these reasons, standardized A-mode ultrasound scans and contacts