I.胃X線撮影における技術的諸問題(消化管撮影における技術的諸問題)

概要

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The radiological diagnosis of the early gastric cancer has made rapid progress by the double contrast study of Dr. Shirakabe. Recently the double contrast study has become to portray clearly the gastric area. The radiological diagnosis of the mucosal spreading and the depth of invasion of the early gastric cancer is going to be attempted. The image quality elements of the double contrast study (Sharpness, Contrast, Granularity, Darkness) are composed by many factors : Fluoroscopy table, Generator, X-ray tube, Grid, Folie, Film, Barium, Examination technique, etc. We have examined the relationship between the image quality elements and the composing factors. The results are summarized as follows : 1) Main composing factors in the sharpness are X-ray focus size and exposure time. There are desirable 0.6mm focus and exposure time less than 0.05 sec. 2) The space material of X-ray grid is one of the most important factor in the contrast. It is made of wood spacer and its ratio is 10 : 1. X-ray tube voltage is 80 kVp. Barium concentration is 130%w/v. 3) The granularity is generally decided by films γ (Gamma).
公益社団法人日本放射線技術学会の論文
1979-11-01