Patent ID: 8167486

Claim:
A radiation imaging system comprising: a radiation imaging unit for performing radiographing using radiation irradiated from a radiation generator that generates the radiation; a table storing unit for storing a table set with radiation conditions of the radiation of the radiation generator for an operation mode of a plurality of operation modes; a selecting unit for selecting an operation mode for performing radiographing from the plurality of operation modes; an image storing unit for storing image data of an image for gain correction obtained based on the radiation conditions set with the table in a state in which an object is not present to be radiographed and in which radiation is irradiated to said radiation imaging unit for the operation mode of the plurality of operation modes; and an image processing unit configured to perform a gain correction processing of object image data, wherein said image processing unit performs the gain correction processing of the object image data obtained based on the radiation condition set in the table of the operation mode selected by the selecting unit in a state in which the object is present to be radiographed using a corresponding image for gain correction extracted from said image storing unit based on the operation mode selected by the selecting unit.