A cradle for use with a radiation conversion device includes a cradle for carrying out charging of a radiation conversion device, the cradle being disposed in the vicinity of an image capturing apparatus which captures a radiation image of a subject, the radiation conversion device detecting radiation that has passed through the subject and converting the radiation into image information. The cradle includes a charging processor for carrying out charging with respect to a battery mounted in the radiation conversion device, an image information acquisition unit for acquiring the image information from the radiation conversion device, a correction information generating unit for generating correction information with respect to the radiation conversion device using the acquired image information, and a correction information memory for storing the generated correction information in association with the radiation conversion device.