| 摘要 |
An apparatus for obtaining a radiation image of an object includes a radiation image sensing unit having a plurality of photoelectric conversion elements two-dimensionally arranged in a matrix manner, and a sensor for detecting irradiation of radiation. The apparatus also includes a determining system for determining an irradiation state of radiation on the basis of an output from the sensor, and a controlling system for controlling both a start and an end of an image sensing state of the radiation image sensing unit on the basis of the determination by the determining step.
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