Radiation imaging system and moving image generation method

A radiation imaging system for generating a moving image, comprising:

• a plurality of pixels each including a signal generation unit configured to convert radiation into charges;
• a reading circuit configured to read, from each pixel, an accumulation signal output from the signal generation unit in accordance with accumulated charges and a reset signal output from the signal generation unit that is in a reset state;
• a storage unit capable of storing data;
• and
• a signal processing unit configured to
• store, in the storage unit, a correction image generated based on the reset signal and the accumulation signal read from each pixel before reception of an imaging start instruction,
• store, in the storage unit, a reset image generated based on the reset signal read from each pixel after the reception of the imaging start instruction and before initial irradiation, and
• generate a frame image in each frame period based on a radiation image generated based on the accumulation signal read from each pixel, and the reset image and the correction image stored in the storage unit.

A method of generating a moving image using data obtained by a radiation imaging apparatus including a plurality of pixels each including a signal generation unit configured to convert radiation into charges, and a reading circuit configured to read, from each pixel, an accumulation signal output from the signal generation unit in accordance with the accumulated charges and a reset signal output from the signal generation unit that is in a reset state, the method comprising:

• storing, in a storage unit, a correction image generated based on the reset signal and the accumulation signal read from each pixel before reception of an imaging start instruction;
• storing, in the storage unit, a reset image generated based on the reset signal read from each pixel after the reception of the imaging start instruction and before initial irradiation;
• and
• generating a frame image in each frame period based on a radiation image generated based on the accumulation signal read from each pixel, and the reset image and the correction image stored in the storage unit.