Radiation imaging apparatus, radiation imaging system, control method for radiation imaging apparatus, non-transitory computer-readable storage medium, and signal processing apparatus

A control method for a radiation imaging apparatus including a plurality of pixels each including a conversion element configured to convert radiation into signal charge and a switch element configured to output an electrical signal corresponding to the signal charge and a signal line to which signals are supplied from the plurality of pixels, the method comprising:

• performing, during irradiation with radiation, a first operation of reading out a signal while the switch element of each of the plurality of pixels is in a non-conduction state and a second operation of reading out a signal while the switch element of a predetermined pixel of the plurality of pixels is in a conduction state, and
• correcting a second signal value of a signal read out by the second operation by using a first signal value of a signal read out by the first operation.

A signal processing apparatus that processes a signal output from a radiation imaging apparatus,

• the radiation imaging apparatus including a plurality of pixels each including a conversion element configured to convert radiation into signal charge and a switch element configured to output an electrical signal corresponding to the signal charge, a signal line to which signals are supplied from the plurality of pixels, and a readout circuit configured to read out a signal supplied to the signal line, wherein
• the readout circuit is configured to perform, during irradiation with radiation, a first operation of reading out a signal from the signal line while the switch element of each of the plurality of pixels is in a non-conduction state and a second operation of reading out a signal from the signal line while the switch element of a predetermined pixel of the plurality of pixels is in a conduction state, and to output signals read out by the first operation and the second operation, and
• the signal processing apparatus is configured to obtain the signals read out by the first operation and the second operation and to correct a second signal value of a signal read out by the second operation by using a first signal value of a signal read out by the first operation.