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介绍一种客观测定大隐静脉—冠状动脉搭桥中血流量的方法。在主动脉根部注射造影剂之前及在注射当时,在录象带上记录下X射线电视录象密度测定成象(roentgen vi-deodensitometric image)之后再重复几次录象,成象的速度是60次/秒。对录象带上的记录进行多次X射线密度分析,便可以在X射线照射野内选定的某两个部位同时获得两条指示剂稀释曲线(在这里实际上是X射线密度衰减曲线)。然后从这些稀释曲线上即可定量测定造影剂的稀释和消散。实时数字计算机(real-time digital computer)
A method to objectively measure blood flow in saphenous vein-coronary artery bypass graft is introduced. The video was recorded several times after recording the radiotracer imaging (roentgen vi-deodensitometric image) on the video tape prior to and at the time of injection on the aortic root, at a rate of 60 Times / second. Performing multiple X-ray density analyzes of the recordings on the tape allows you to obtain two indicator dilution curves (here, the actual X-ray density decay curve) at the same time for two selected spots in the X-ray field. The dilution and dissipation of the contrast medium can then be quantitatively determined from these dilution curves. Real-time digital computer