X線管焦点寸法の相違による画質の心理的評価

概要

論文の詳細を見る
Uncertainty analysis by entropy is applied to a method of psychological evaluation in radiographic images and to an examination of visual evaluation of sharpness in radiograms. Subjects are composed of three groups of seven radiologic technologists, seven neurosurgeons and eight radiologists. By using a three-category rating scale, each observer is directed to classify 160 skull radiograms randomly presented. Each radiogram is taken by four kinds of focal spot sizes. Characteristics of each observer and each group can be shown quantitatively by calculated information values. In an evaluation of radiographic images, radiologic technologists attach importance to physical characteristics of radiograms, but doctors do not do so. They attach importance to morphological and morbid variations of objects. Consequently, radiologic technologists have a close correlation between physical evaluation and a psychological one of radiograms, and doctors have only a little correlation.
公益社団法人日本放射線技術学会の論文
1981-11-01