II.一般撮影領域における自動露出装置について(X線装置の自動露出機構について)

概要

論文の詳細を見る
The X-ray detective area and shape (Phototimer, Iontimer, Solidtimer, ) are very important subject on a automatic exposure systems. In this study we explain about the result for the basic problems of conventional utilized systems. The basic problems contains are the photo pick-up area and total characteristics of the automatic exposure system. Selection of photo pick-up area were introduced by statistics caluculation. Statistics calucalation was measured by the data of density distribution of 240 radiographies. The result of clinical uses, the our experimental photo pick-up is better than the convertional utilized type. Tube voltage characteristics of phototimer was given expression to ratio of screen and fluorescence paper of photo pick-up. We made explained that the phantom thickness characteristics was caused by the existence of reciprocity law failure. Phantom thickness characteristics and tube voltage characteristics are compensated with corrector circuit. The problem of time response for high speed cut off signal is settled when the X-ray controller used a high speed contactless switching unit.
公益社団法人日本放射線技術学会の論文
1980-09-01