Patent ID: 7734016

Claim:
A radiographic imaging apparatus, comprising: a radiation source configured to irradiate a subject with radiation; a radiation stop unit configured to shape the radiation in a plurality of beam limiting forms; a radiation detector including a plurality of detecting units and having a rectangular external shape, said detecting units being arranged in a two-dimensional array, said radiation detector being configured to detect a radiation distribution of the radiation passing through the subject with said detecting units; and a supporter configured to hold said radiation detector, wherein said supporter includes: a rotation supporting unit configured to support said radiation detector so as to enable rotation of said radiation detector around an axis located substantially at the center of an effective imaging region, a rotation sensing unit configured to sense rotation of said radiation detector, and a control unit configured to control said radiation stop unit when said rotation sensing unit senses the rotation of said radiation detector so that the beam limiting form of said radiation stop unit is changed so as to be constantly arranged within the effective imaging region of said radiation detector.