Image Contrast Evaluation with Scheffé’s Paired Comparison Method for Abdominal Digital Radiography using Additional Copper Filtration

Abstract

The purpose of this study is to examine the abdominal X-ray image contrast with additional Cu filtration using Scheffé’s paired comparison method. We obtained abdominal phantom images with different Cu filter thickness after dynamic processing. We measured the image contrast of abdominal phantom images and evaluated them using Scheffé’s paired comparison method. The observers were 7 radiological technologists (2 to 33 years of experience, average 15.6 years). Approximately, there was a maximum of 16 % decreasement in the image contrast when we added 0.3 mm Cu filtration. There was no significant difference in Scheffé’s paired comparison method (95 % confidence interval) . From these results, abdominal X-ray with up to 0.3 mm Cu filtration does not decrease visually significant image contrast. Abdominal X-ray with up to 0.3 mm Cu filtration does not decrease visually image contrast.