Provided is a technology with which defective pixel information in taking a radiation image and defective pixel information in detecting a dose can be generated efficiently. Provided is a radiation imaging apparatus including: a plurality of pixels arranged to convert radiation into an electric signal； and a generation unit configured to generate, based on the electric signal obtained as a result of the conversion by the plurality of pixels, first defective pixel information indicating a defective pixel in taking a radiation image of the plurality of pixels, and second defective pixel information indicating a defective pixel in detecting a dose of the plurality of pixels.
