Larsen L E, Evans R A
Radiology. 1977 May;123(2):361-7. doi: 10.1148/123.2.361.
Early clinical application of an off-line image processing and analysis system for digital display in conjunction with computed tomography is described. The system consists of three operational subsystems: (a) a flexible disk for digital storage of absorption values in each of eight or more tomographic planes; (b) a high-speed interactive video system which displays the tomographic plane in correct geometry with the absorption values, which serve as the pictorial elements; and (c) a paper hard copy of the absorption values in a simulated gray-tone image of the tomographic plane in which the numerical values are the pictorial elements. Both the video and paper displays provide explicit numerical values of x-ray attenuation for each location on the tomographic plane in an image which combines analog and digital qualities.
本文描述了一种用于计算机断层扫描数字显示的离线图像处理和分析系统的早期临床应用。该系统由三个操作子系统组成：（a）一个软盘，用于数字存储八个或更多断层平面中每个平面的吸收值；（b）一个高速交互式视频系统，它以正确的几何形状显示断层平面，并将吸收值作为图像元素；（c）在断层平面的模拟灰度图像中以纸质硬拷贝形式呈现吸收值，其中数值作为图像元素。视频和纸质显示都在结合了模拟和数字特性的图像中，为断层平面上的每个位置提供了明确的X射线衰减数值。
