シネ撮影装置における自動露出機構の管理計器の開発

概要

論文の詳細を見る
An instrument for management and adjustment of automatic exposure control unit in cineradiography was developed. In this instrument, test radiography with film is not needed since the quantity of relative input light intensity to cine camera is measured with photodiode directly. The instrument is provided with the following properties : 1)The relationship between the iris diameter and the quantity of relative input light intensity measured by the instrument is linear from three to ten and becomes saturated at thirteen. 2)The quantity of relative input light intensity and the photographic density change when density setting value point changes. 3)The quantity of relative input light intensity was approximately fixed, and had no relationship to x-ray tube voltage, tube carrent and exposure pulse time, provided x-ray intensity which is incident on the image intensifier was fixed 4)The quantity of relative input light intensity doesn't change even if the image intensifier size is changed. 5)The quantity of relative input light intensity increases when frame number is increased. The possible cause is in the integrating circuit of the instrument. However, this does not limit the use if the frame number is fixed during measurements. Accordingly, management and adjustment of automatic exposure control unit are completed more simply by using this instrument.
社団法人日本放射線技術学会の論文
1996-04-20