QUANTITATIVE EVALUATION OF RADIOGRAPHIC IMAGE QUALITY BY A NEW METHOD

Abstract

A new method for quantitative evaluation of radiologic image quality is proposed. In this method the smallest detectable contrast in radiographs is quantified from film density fluctuations by a mean of testing statistical hypothesis. This new measure called "contrast discrimination" expresses the radiographic image performance by a single number. By using this measure the imaging performance of radiographic recording systems was evaluated and, moreover, the total image performance in the nonstationary processes was evaluated.