Patent ID: 8742354

Claim:
A radiation image capturing device comprising: an image capturing unit that captures a radiation image using irradiated radiation; a radiation detection unit that detects the radiation; a determination unit that determines whether image capturing preparation is completed; a control unit that starts detection of the radiation by the radiation detection unit, in a case in which the determination unit determines that the image capturing preparation is completed, and controls the image capturing unit to capture a radiation image, in a case in which the radiation detection unit detects the radiation; an image capturing panel comprising a plurality of pixels that convert radiation, which is emitted from a radiation source and is transmitted through the subject, into electric signals and accumulate the electric signals, and that are arranged in a matrix; and a movement amount measurement unit that measures a movement amount of the image capturing panel; wherein the determination unit determines that the image capturing preparation is completed according to the movement amount measured by the movement amount measurement unit, and wherein the control unit further comprises a read control unit that starts a read mode which reads the electric signals accumulated in the pixels, according to the movement amount measured by the movement amount measurement unit, ends reading of the electric signals in a case in which values of the electric signals read in the read mode become more than a threshold value which is arbitrarily set, and transitions the image capturing panel to an exposure state.