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我院于1986年底由美国引进了一台型号为 Delta-100的旧头颅 CT 扫描机。随机带来的三只 X 线管均为已使用过的旧品,安装后使用时间不长均先后出现了 X 线管套内高压放电的故障。该机额定工作条件为120kV,25mA,扫描时,当高压升到80kV 左右即可听到管套内的高压放电声,同时,高压控制柜上的 kV表迭落。mA 表上冲,并在扫描图像上出现多道高密度亮线。X 线管是 X 线 CT 扫描机的关键部件之一,目前这种 X 线管仍依赖于进口,价格十分昂贵,据1987年外商报价约合人民7万多元,差不多为主机价格的
Our hospital in the end of 1986 by the United States to introduce a model for the Delta-100 old head CT scanner. Randomly brought three X-ray tube are used old products, installation is not long after the use of X-ray tube have appeared in the high-voltage discharge failure. The machine rated working conditions of 120kV, 25mA, scanning, when the high pressure rose to about 80kV can hear the high voltage discharge tube sound, at the same time, high voltage control cabinet on the kV table Diego. mA table on the red, and in the scanned image appear on the road a number of high-density bright lines. X-ray tube is one of the key components of X-ray CT scanner. At present, the X-ray tube is still dependent on imports and the price is very expensive. According to the quotation of foreign businessmen in 1987, the price is about 70,000 yuan, which is almost the same as the host price