Patent ID: 8971494
Filing Date: 2015-03-03
Classification: A61B

Abstract:
1. A radiation imaging apparatus that performs main imaging for taking a radiographic image for use in diagnosis and preliminary imaging prior to said main imaging for determining a main exposure condition being an exposure condition used in said main imaging, said radiation imaging apparatus comprising: a radiation image detecting device having a detection panel having an arrangement of a plurality of pixels each for receiving radiation emitted from a radiation source and passed through an imaged portion; a dose detection sensor for detecting a received radiation dose passed through said imaged portion; an automatic exposure controller for comparing an integral value of said received radiation dose with a predetermined threshold value, and automatically stopping emission of said radiation from said radiation source in said preliminary imaging if said integral value has reached said threshold value; and a main exposure condition determination unit for determining said main exposure condition based on said integral value of said received radiation dose detected during said preliminary imaging and a necessary radiation dose required for ensuring image quality of said radiographic image, said main exposure condition including a main irradiation time being an irradiation time with said radiation during said main imaging or a main time-current product being a time-current product used during said main imaging, said main imaging being carried out with use of said determined main exposure condition.