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数字减影血管造影(Digital SubtractionAngiography)(简称DSA),是八十年代X线图象摄影的新技术。它利用电子计算机把图象的视频信号转换为数字信号,并把掩模象数据同血管造影图象数据进行相减,能将血管以外的信号去掉,最后把相减的数据进行信号放大,再转换成视频信号,重建模拟图象输出,显示出对比增强的血管造影图象。我们利用这一新技术对50例临床拟诊为肝肿瘤的病例进行选择性或超选择性肝动脉
Digital Subtraction Angiography (abbreviation: DSA) is a new technique for radiographing in the 1980s. It uses an electronic computer to convert the video signal of the image into a digital signal, and subtracts the mask image data from the angiographic image data. The signals outside the blood vessel can be removed. Finally, the subtracted data is amplified and then the signal is amplified. Convert to a video signal and reconstruct the analog image output to show a contrast-enhanced angiographic image. We have used this new technique to selectively or superselectively treat 50 cases of clinically diagnosed liver tumors.