Decker D, Faust U, Irion K M
Med Prog Technol. 1981;8(2):83-91.
A computer-aided interactive method based on A-scan analysis using broadband RF-signals (15 MHz centre frequency) is presented. This method is used for the characterization of tissue layers of the posterior wall of the human eye in vivo. The following topics are discussed: - Automatic signal pre-processing and formation of a patient-specific, representative echogram. - Comparative studies using various methods from the time and frequency domain for the determination of layer thickness. - Analysis of the boundary surfaces by their spectral distribution, taking into account the roughness of the surface in relation to the ultrasonic wavelength. The characterization and differentiation of tissue layers by means of sets of features are explained with examples from intact posterior wall, detached retinas, vitreous membranes and from intraocular tumours. The differentiation of detached retina and other membranes by comparison with adjacent layers is discussed.
提出了一种基于使用宽带射频信号（中心频率15MHz）的A扫描分析的计算机辅助交互式方法。该方法用于在体内表征人眼后壁的组织层。讨论了以下主题：- 自动信号预处理以及形成患者特异性的代表性超声心动图。- 使用时域和频域中的各种方法进行层厚度测定的比较研究。- 通过其频谱分布分析边界表面，同时考虑表面粗糙度与超声波长的关系。通过来自完整后壁、视网膜脱离、玻璃体膜和眼内肿瘤的实例，解释了通过特征集对组织层进行表征和区分。讨论了通过与相邻层比较来区分视网膜脱离和其他膜。
