We have produced a milli-ampere-second timer composed of an electron tube circuit and a break and make swich ; and a milli-ampere-second indicator attached to the former, which indicates accurately milli-ampere-second whether the time of swiching on an electric circuit be long or short. The mechanism of these above-mentioned is reported here in this article.
Applying X-Ray tube voltage which is divided by non-derivative high resistance and voltage fall caused by tube current, to Ossiloscope's horizontal deflecting plat, and vertical deflecting plat. Respectively, made them draw Lissajous figures. We analyzed this figures considering on waves of tube voltage and current which were obtained separately, and seeked for the X-Ray tube voltage and electric current property analytically and examined the agreement with the theoretical value.
By a fundamental experiment, we examined the relation between crossed out shadow and interference shadow of S.S. type transversal planigraphic apparatus, and got the conclusion that the shadow which is an obstacle to the inspection of photograph is interference shadow and crossed out shadow is its substance.
On the occasion of taking a cubic X-ray photograph of the chest, a set of X-ray photograph is taken at the moment the expansion of heart adjouning palpitation is comparatively still. It is in order to get an accurate cubic sense, and this article reports the particular circuit, the exchanging apparatus of shockless film, and the cardiocairo-graph apparatus.
We tried traversing photographing of the optic nerve aperture making use of a planigraphic apparatus. In this article, various photographing methods are explained and additionally their respective X-ray pictures are illustrated.
In order to keep the density of X-ray photograph somewhat regular even when different intensifying screens are to be used, a list of revised numeral coefficient for aurora intensifying screen was made on the four fundamental photographing conditions : tube voltage, tube current, time of exposure, and the focal distance of film. This article explains how to make and how to apply the above-mentioned list and gives some examples of its application.
Concerning the simultaneous photographing technique of the side of uppor neck verbebra and uppor chest verbebra, and of both lungs of different absorptivity in the field of surgery, this article explains the very technique we are actually practising in our departments, and in addition, illustrates some X-ray pictures.