抄録
In x-ray photography in which fluorescent intensifying screen is used, the radiation of the fluorescence is not proper for the sensibility of a x-ray film. The radiation of the fluorescent material is apt to be absorbed or scattered through the intensifying screen. Especially the phenomena of scattering decreases the sharpness of x-ray photograph. However, when various color films are put between the intensive screen and the film, the fluorescent spectrum changes. Therefore, the author changed the fluorescent spectrum to accord the spectrum of film with the intensive screen. Thus the sharpness and contrast of x-ray photography were improved in this experiment.
