Radiation imaging apparatus, method of controlling the same, and radiation imaging system

摘要

There are provided an apparatus capable of complying with arbitrary data acquisition period (frame rate) change instruction without increasing load and cost, and a method and a system for controlling such an apparatus. To realize this, in the present invention, there are included an area sensor for reading out an electric signal accumulated in a plurality of pixels arranged in a matrix, a line by line, and a control unit for controlling the area sensor. The area sensor operates in a first operation for deriving a radiation image data by the reading under an irradiation with a radiation, and a second operation for deriving the radiation image data by the reading under a non-irradiation with the radiation, alternately. The control unit switches a period for deriving the radiation image data during a time period from an end of the reading in the first operation until an end of the reading in the second operation.