抄録
Authers express sharpness, scattering, exposure, on magnified high valtage roentgenography expecially the relationships between focus and penumbra. were studied.
The factors of exposure were 125K.V.p., target-film distance 200cm, Kyokko's F.S. intensifying screen, rotating anode of 0.3×0.3mm by Siemens Heliophos Super.
