一种新的电视贮存系统,它能够贮存 X 线萤光增强透视时所摄取的电视图象,然后再按减薄术(Subtraction)重叠于活动的透视图象上。血管造影时,该系统的使用法如下:首先,从导管注入造影剂,将造影图象予以贮存。之后,活动的透视提供血管系的减薄性图象。这样,血管系的图象便展示在透视屏上,从而使导管易于进入正确的部位。当血管的背景结构杂乱时,减薄术的采用有助于动脉的 A new television storage system capable of storing a television image taken by X-ray fluorescence for enhanced fluoroscopy and then superimposed on an active fluoroscopic image by subtraction. When angiography, the system is used as follows: First, contrast medium is injected from the catheter to store the contrast image. Afterwards, the perspective of activity provides a thinning image of the vascular system. In this way, the image of the blood vessel is displayed on the see-through screen, allowing easy access of the catheter to the correct site. When the background structure of blood vessels is messy, the use of thinning contributes to the arteries