For performing imaging with a high-frame rate, a control apparatus determines the time where at least one electrical charge of a sensor (4) is read based on information about the position of an irradiation area of the sensor (4), the irradiation area being irradiated with a radiation, so that the time period where at least one electrical charge of a non-irradiation area of the sensor (4) is read, the non-irradiation area being irradiated with no radiation, overlaps the time period where irradiation with the radiation is performed and the time period where at least one electrical charge of the irradiation area of the sensor (4) is read does not overlap the radiation-irradiation-time period.
