Image pickup apparatus and radiation image pickup system

A radiation image pickup system, comprising:

• an image pickup apparatus including a pixel array including a plurality of pixels arranged in a two-dimensional pattern, each of which includes a conversion unit configured to convert radiation or light into an electric charge, an amplification unit configured to amplify the electric charge, a first holding unit configured to hold a first signal obtained by the amplification unit amplifying the electric charge converted by the conversion unit having a first sensitivity, a second holding unit configured to hold a second signal obtained by the amplification unit amplifying the electric charge converted by the conversion unit having a second sensitivity, which is different from the first sensitivity, and a third holding unit configured to hold an offset signal of the amplification unit, and a correction unit configured to correct the first signal with reference to a second output signal output from the second holding unit or a first output signal output from the first holding unit, and a third output signal output from the third holding unit;
• a processing apparatus configured to process a signal received from the image pickup apparatus;
• and
• a radiation generating apparatus configured to generate radiation travelling toward the image pickup apparatus.

A radiation image pickup system comprising:

• an image pickup apparatus that includes a pixel array including a plurality of pixels arranged in a two-dimensional pattern, each of the pixels includes a conversion unit configured to convert radiation or light into an electric charge, an amplification unit configured to amplify the electric charge, a signal holding unit configured to hold a signal amplified by the amplification unit, and an offset holding unit configured to hold an offset signal of the amplification unit,
• a correction unit configured to correct in such a way as to reduce differences between noise components included in the signal held by the signal holding unit and noise components included in the offset signal;
• a processing apparatus configured to process a signal received from the image pickup apparatus;
• and
• a radiation generating apparatus configured to generate radiation travelling toward the image pickup apparatus.