胸部撮影法の検討 第6報 : 直接用ホトタイマについて

抄録

Quit a large number of researches on the controling system of the amount of X-ray in taking X-ray pictures have been conducted for as long as about 40 years throughout the world. Various studies in Japan too, have been made on the same subject for the indirect method to the stage where its practical utilization is possible. However, there still exist quite a few problems to be solved regarding the photo-timer of the direct method. The report tells us the results of the studies on the basic features of the pertinent photo-timer utilizing the ligh-taking window of the model lung. The studies covered such basic items as performance fluctuations, adjusting and conpensation methods for the density aiming at reaching the stage where the obtaining of a reproducible chest picture is possible.