Abstract
A condenser discharge type X-ray apparatus, which has capacitance of 3.2μF and a wave tail chopping device, has been developed. The characteristics of this machine, especially the X-ray spectra emitted, photographic effects such as film density, contrast and unsharpness of the X-ray picture have been investigated. The characteristics of a three phase X-ray machine, which has been considered as the most excellent diagnostic apparatus owing to the homogeneity of the X-ray, high permissible load of the X-ray tube and very short exposure time, have been also studied. The conculusion obtained by the comparison of these data are as follows : 1. The spectra of X-ray, emitted from the condenser apparatus, have more components in the short wave region than those given by the three phase apparatus. 2. The value of milliampere-seconds necessary for the same film density at the same tube voltage is less in the case of condenser apparatus than the three phase machine. 3. The unsharpness of X-ray picture of a phantom, obtained by the condenser apparatus is smaller than that obtained by the three phase machine, both pictures having the same contrast. In other words, the contrast of X-ray picture obtained by the condenser apparatus is better than that obtained by the three phase machine, both pictures having the same unsharpness.
