RADIATION IMAGE ANALYSIS DEVICE AND METHOD, AND RADIOGRAPHIC DEVICE

摘要

PROBLEM TO BE SOLVED: To calculate an EI having high reliability without taking much time and trouble.SOLUTION: An electronic cassette 13 includes a lighting field setting part 56 for automatically setting a lighting field being an area of a detection pixel 41b for detecting dose for an AEC during irradiation of X-ray on the basis of a dose detection signal from the detection pixel 41b. A console 14 acquires lighting field information set by the lighting field setting part 56 and an X-ray image with an information acquisition part 82. A calculation part 80 determines the lighting field set by the lighting field setting part 56 as a calculation area for calculating an EI, extracts a representative value V from a pixel value of a pixel 41 existing in the lighting field, and calculates an EI on the basis of the extracted representative value V.