Patent ID: 8792022

Claim:
An image pickup apparatus comprising: a detector including a detection unit including a plurality of conversion elements each configured to convert radiation or light into an electric charge, a driving circuit configured to drive the detection unit to output an electric signal corresponding to the electric charge from the detection unit, a reading circuit configured to output the electric signal as image data, whereby the detector performs an image pickup operation to output the electric signal; a power supply unit configured to supply a voltage to the conversion elements; a temperature detection unit configured to detect a temperature of the detection unit; and a calculation unit configured to calculate an amount of noise and an amount of afterimage that is included in the electric signal or the image data in the image pickup operation, based on output characteristic information indicating a characteristic in terms of changes in amount of noise and amount of afterimage that is included in the electric signal or the image data as a function of elapsed time since the supplying of the voltage is started, the temperature, the voltage, and an image pickup operation start time indicating a time elapsed since the supplying of the voltage from the power supply unit to the detection unit is started until the image pickup operation is started.