About the them of the moment load of the X-ray tube filament in the condenser-X-ray apparatus, I studied the differences of the moment load by the charging methods, especially on the total charging photography, and experimented systematically about the filament-load in a very short time as in the wave end cutting photography. This expecimental results are thus.
Many people have already reported about the X-ray dose on every place at the time of X-ray photograph, but, we consider, it is necessary to modify it by increasing sensitivity of the various sensitive materials. From the results of our experiment under such thinking, we proved that the dose could be reduced and the photographing frequency could be increased more than before.
I found the method to be able to photograph by from so near by using the portable X-ray apparatus, and by this method the position, forms, etc. ofthe Crvity in the lung can be known exactly before resection of the Cavity.
I measured the efficiency of the trial electron tube timer and the electromagnetic switch by using the Storob. Graphy for 681 men. This experimental results are thus.
By adding sulphuric hydrozine to the waste of developer sulution for the M.Q. X-ray film, its developing ability can be revived.From the result of our experiment, it is influenced so much by temperature of the developer, and the proper dose is about 1.5gr/l.
On Photographing the sterumm, only it can be photographed so clearly and independently by means of a low voltage, the near photography, using nointensifying screen and Continuing to breath while photographing. This method is thus.
The simple tomography apparatus has been investigated and reported very much, but it is so difficult to add it to the in direct photography apparatus, which has been used generally in many hospitals. Then I produced for trial the standing position tomography apparatus of the tuge-fixation style and tried to add it to the indirect photography apparatus. The structure and the management of this apparatus are thus.