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数字减影血管造影(Digital Subtraction A-ngiography,简称DSA)是本世纪80年代应用于临床的X线摄影新技术。它是把血管造影图象的视频信号转换为数字信号,然后进行图象数据处理,最后重建模拟图象输出,显示对比度增强的减影图象。心脏大血管是DSA应用的主要部位之一。 一、心脏数字减影的技术
Digital subtraction angiography (Digital Subtraction A-ngiography, referred to as DSA) is the 80’s of this century for the clinical application of new radiographic techniques. It is the angiography image of the video signal is converted to digital signals, and then image data processing, and finally rebuild the analog image output, display enhanced contrast subtraction images. Cardiac vessels are one of the major parts of DSA applications. First, the digital subtraction of the heart of the technology