RADIATION IMAGING SYSTEM, OPERATION METHOD THEREFOR, AND RADIOGRAPH DETECTION EQUIPMENT

摘要

A receptor field-selecting circuit (75) comprises an irradiation field-specifying unit (120), an object area-specifying unit (121), and a receptor field area-specifying unit (123). The irradiation field-specifying unit (120) specifies an irradiation field in the image pickup surface (47) of a FPD (45) based on the collimator angle of the irradiation field limiter (17) and the positional relationship between the X-ray source and the electronic cassette (13). The object area-specifying unit (121) specifies an object area from the result of comparing a first predicted received dose of a bypassed area calculated by a first predicted received dose-calculating unit (122) and the dose detection signals of detection pixels (65) in the irradiation field. The receptor field area-specifying unit (123) specifies a receptor field area from the result of comparing a second predicted received dose for the receptor field area in the region of interest of highest diagnostic concern and the dose detection signals of detection pixels (65) in the irradiation field and the object area. The dose detection signals of detection pixels (65) that are specified as the receptor field area are used for AEC. AEC receptor fields can thereby be easily and quickly established.