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为提高血管造影的摄片质量,避免X射线对医务人员的直接照射,我们试制了一台血管造影自动光控仪,经临床使用,效果良好。仪器分两部分:光电放大控制电路与自动注射部分。光电放大控制电路如图1所示。B为电源变压器,次级2V供发光源用,9V经整流滤波,供电路其它部分使用。G为聚光发光源,采用手电筒用的聚光小电珠。BG_1,为光电管3DU22,它的作用为接收从
In order to improve the radiographic quality of angiography and avoid the direct radiation of X-ray to medical staff, we made a trial of an angiography automatic photocontrol instrument which has good effect after clinical use. Instrument is divided into two parts: photoelectric amplification control circuit and automatic injection part. Photoelectric amplification control circuit shown in Figure 1. B for the power transformer, secondary 2V for light source, 9V by the rectifier filter for the rest of the circuit to use. G for the light-emitting light source, the use of small condenser flashlight beads. BG_1, for the photoelectric tube 3DU22, its role is to receive from