Dobbertin I, Dierkesmann R
Klinik Schillerhöhe, Zentrum für Pneumologie und Thoraxchirurgie, Gerlingen.
Pneumologie. 1992 Aug;46(8):322-5.
The optical resolution in the fibrescopes commonly in use is limited by the number and length of glass fibres used in the endoscopes. In the videoscope--i.e. in the direct videoscopy--the endoscopic picture is transformed already in the tip of the endoscope into electronic signals which can be guided through electrical wire nearly free from losses. This results in an enormous improvement of the image quality. Some problems arise from the adjustment of the light intensity yielding too much brightness in the short-distance and darkness in the depth. Furthermore, the work channel of the prototype we used is still too small. The investigation with this new technique requires an increased coordinative effort between the handling of the instrument and the picture on the monitor; but with some practice one becomes familiar with it. The pictures of the bronchial wall are extremely brilliant. Unusual structures of bronchial mucosa can be analyzed. Microscopic endoscopy seems to be only a short step away. Digital processing of the electronic image offers extraordinary perspectives for the future.
目前常用的纤维内镜的光学分辨率受限于内镜中使用的玻璃纤维的数量和长度。在视频内镜中，即在直接视频检查中，内镜图像在其顶端就已被转换为电信号，这些电信号能够通过电线几乎无损耗地传输。这使得图像质量得到了极大的提升。不过，光强度的调节也带来了一些问题，比如近距离时亮度太高，而深处则较暗。此外，我们所使用的原型的工作通道仍然太小。使用这项新技术进行检查需要在仪器操作和监视器上的图像之间进行更多的协调工作；但经过一些实践后，人们就会熟悉它。支气管壁的图像极其清晰。可以分析支气管黏膜的异常结构。微观内镜检查似乎指日可待。电子图像的数字处理为未来提供了非凡的前景。
