X线数字减影技术(X—ray Digital Subtra-ction System)是在70年代继CT之后出现的又一项重大派生技术。它是将CT的影象处理方法和图象重建技术移植到现代X线设备上,通过电子计算机的处理,对于循环系造影后的X线图象。具有较高的显现能力和良好的清晰度、对比度,能观察到过去不易看到的小血管。国外已广泛应用于临床,已成为近代放射医学中引人注目的一项成就。 The X-ray Digital Subtraction System is another major derivative technology that emerged after the CT in the 1970s. It is the CT image processing methods and image reconstruction technology to modern X-ray equipment, through the computer processing, for the Department of X-ray images after radiography. Has a high ability to show and good clarity, contrast, can be seen in the past not easy to see the small blood vessels. Abroad has been widely used in clinical practice, which has become an eye-catching achievement in modern radiology.