RADIATION IMAGING APPARATUS

A radiation imaging apparatus includes a radiation detection unit including a scintillator for converting radiation into light and a photoelectric conversion element for converting light into electric charge and configured to generate an image, an acquisition unit configured to acquire a first image generated by the radiation detection unit in a radiation irradiated state and, after that, acquire a second image generated by the radiation detection unit in a radiation non-irradiated state, and an estimation unit configured to estimate presence or absence of bright burn in the scintillator based on the second image.