摘要 |
PROBLEM TO BE SOLVED: To provide a radiation imaging apparatus capable of restraining the change of image qualities due to the change of sensitivities of an MIS-type photoelectric conversion element, and its control method. SOLUTION: The MIS-type photoelectric conversion element 217 is set to a saturation state before performing radiation imaging. As a means for attaining the state, a light source 601, power supply 603 for making the light source 601 emit light, and switch 605 are provided. The light source 601 can use the one capable of discharging the light having a wavelength which can be detected by a photoelectric conversion layer 209 at optional timing. For example, it is possible to use the light source in which a plurality of LEDs or cold cathode ray tubes are arranged, a light guide plate is combined with the LED or the cold cathode ray tube, or an EL device. COPYRIGHT: (C)2007,JPO&INPIT
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