Satava R M, Poe W, Joyce G
Department of General Surgery, Eisenhower Army Medical Center, Fort Gordon, GA 30905.
Am Surg. 1988 Feb;54(2):73-7.
Video endoscopy is the latest technical advance in the observation of the gastrointestinal tract. In 2 years, three video endoscope systems have emerged to develop the field of digital imaging. In order to accurately assess the rapidly changing technology, these state of the art systems were "bench" tested in an electronics laboratory to objectively compare resolution, brightness (luminosity), color intensity (chroma), and field of view. All systems were excellent, surpassing the professional broadcasting minimum standards for the adequate discrimination of objects and colors. The Welch Allyn Video-Endoscope originated video endoscopy continued to demonstrate a superior resolution; however this was at the expense of a significantly more narrow field of view, relative to the two newer systems. Although all systems have adequate luminosity and chroma, there were differences in the maximum amounts of luminosity and chroma. This is reflected in the observation that the most recently introduced system, Olympus Endoscopic Video Information System had relatively low levels of light beyond 9 cm from the tip, while the other systems had ample illumination. This report on the relative advantages of each system is based on the interpretations, implications, and practical applications of these findings.
视频内窥镜检查是胃肠道观察领域的最新技术进展。在两年内，出现了三种视频内窥镜系统，推动了数字成像领域的发展。为了准确评估快速变化的技术，这些最先进的系统在电子实验室进行了“台架”测试，以客观比较分辨率、亮度（光度）、颜色强度（色度）和视野。所有系统都很出色，超过了专业广播对物体和颜色进行充分辨别的最低标准。伟伦视频内窥镜开创的视频内窥镜检查继续展现出卓越的分辨率；然而，相对于另外两种较新的系统，其视野明显更窄。尽管所有系统都有足够的亮度和色度，但在亮度和色度的最大量方面存在差异。这体现在以下观察结果中：最新推出的系统，即奥林巴斯内窥镜视频信息系统，在距尖端9厘米以外的地方光线相对较弱，而其他系统则有充足的照明。本报告关于每个系统的相对优势是基于这些发现的解释、影响和实际应用。
