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静电摄影技术在一九三七年美国的 CarlSoN 发现之前,就已发现某些光导材科除可感受可见光外,对 X 线亦甚敏感,而可用于 X 线摄影。国外静电摄彩真正用于医学 X 线摄影是在五十年代初期.当时是将无定型硒用真空蒸发的方法蒸镀在铝基板上,在暗的情况下通过电晕放电使硒板带上一层均匀的正电荷,表面电位达1000-1600伏,并置于一暗盒内进行 X 线曝光,这时硒板上的电位随接受 X 线剂
Before the discovery of CarlSoN in the United States in 1937, electrophotography was found to have some photoconductive materials that, in addition to the visible light, were also sensitive to X-rays and could be used for radiography. Electrostatic photography abroad for real medical X-ray photography was in the early fifties when amorphous selenium was evaporated by evaporation on the aluminum substrate, in the dark case through the corona discharge selenium plate A layer of positive charge, the surface potential of 1000-1600 volts, and placed in a cassette for X-ray exposure, then the potential of selenium plate with the X-ray dose