Subtraction radiography by means of additive color.
Subtraction radiography by means of additive color.
复制标题
通过加色进行减影射线照相。
作者：
G. Schwarz
彩色射线照相术在过去主要用于（a）扩展射线照相法的摄影范围，即，利用更多的人眼的可用感知能力，（B）用颜色代替对比度，同样是心理物理学方法，（c）区分同一对象的高千伏和低千伏射线照片，以及（d）手色讲座重复，即，通过人工手段选择性地强调某些解剖结构。下面，将描述自动生成其自身颜色的减影射线照相方法。尽管在1935年首次描述了黑白白色减影射线照相术（1），但由于以下两个原因，迄今为止还没有被接受：a.它需要增加一个摄影过程，其中两个射线照相配对中的一个通过接触印刷被反转.最近，一种双闭路电视观看器已经上市，它以牺牲分辨率为代价，以电子方式反转其中一个配偶的图像。B.需要..
Color radiography has been employed in the past mainly to (a) extend the photographic range of the radiographic process, i.e., utilize more of the available perceptive power of the human eye, (b) substitute color for contrast, likewise a psychophysical method, (c) discriminate between a high- and low-kilovoltage radiograph of the same subject, and (d) hand-color lecture transparencies, i.e., selectively emphasize certain anatomic structures by artificial means. Below, a method of subtraction radiography will be described which generates its own color automatically. Black - and - white subtraction radiography, though first described in 1935 (1), has not gained acceptance to date for the following two reasons : a. It requires an added photographic process in which one of the two radiographic mates is being reversed by contact printing. Recently, a dual closed-circuit television viewer has been marketed which reverses the image of one of the mates electronically but at the expense of resolution. b. It requ...