BACKGROUND

Field of the Disclosure

The present disclosure relates to a radiation imaging apparatus, a radiation imaging system, and a method of controlling a radiation imaging apparatus.

Description of the Related Art

Radiation imaging apparatuses having a function of monitoring irradiation of radiation are known. With this function, the radiation imaging apparatus can detect, for example, a timing at which irradiation of radiation from a radiation source was started, a timing at which the irradiation of radiation is to be stopped, and an irradiation amount or an integrated irradiation amount of radiation. Through detection of an integrated irradiation amount of radiation that has been transmitted through a subject and stopping of the irradiation of radiation by the radiation source at a time point when the detected integrated irradiation amount has reached an appropriate amount, automatic exposure control (AEC) is enabled. To achieve this function, there are known radiation imaging apparatus including pixels for detecting a radiation dose irradiated separately from pixels for taking a radiation image.

In Japanese Patent Application Laid-Open No. 2014-66689, there is disclosed a method in which, when a defect occurs in a dose detection pixel, a radiation dose cannot be detected appropriately, and hence the defect is extracted from a difference of two detection signals obtained with different accumulation times in dose detection pixels.

In the related art, the defect is extracted only in the dose detection pixels, and hence it is required to separately extract a defect in imaging pixels for taking the radiation image by a different method.

SUMMARY

It is an object of the present disclosure to provide a technology with which defective pixel information in taking a radiation image and defective pixel information in detecting a dose can be generated efficiently.

According to at least one embodiment, there is provided 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.

Further features of various embodiments will become apparent from the following description of exemplary embodiments with reference to the attached drawings.

