Patent ID: 7386089

Claim:
A radiographic imaging apparatus comprising: a radiation detection circuit in which a plurality of conversion elements to convert radiation emitted from a radiation source and transmitted through an object into an electrical signal are arranged two-dimensionally; a driving mechanism which changes a positional relationship between the object and the radiation source and said radiation detection circuit; a memory which stores, as image data, the electrical signal detected by said radiation detection circuit; an imaging controller configured to control the radiation source so as to emit a first radiation pulse at a first energy when imaging a first frame and to emit a second radiation pulse at a second energy when imaging a second frame, and to control said driving mechanism so as to maintain the positional relationship during a first period in which the first radiation pulse is emitted and during a second period in which the second radiation pulse is emitted and to change the positional relationship in a period, during which neither the first radiation pulse nor second radiation pulses is emitted, between the first period and the second period, wherein the second frame is different from the first frame and the first and second frames are sequentially imaged; and an image processing unit which executes subtraction processing of image data of the first frame and image data of the second frame stored in said memory to generate a processed image and generates one of a tomographic image and a 3D image of the object by using the processed image.