Patent ID: 8279999

Claim:
An X-ray CT apparatus comprising: an X-ray generator; an X-ray detector, arranged opposite to said X-ray generator by sandwiching a subject, configured to collect, as projection data, X-rays that have been exposed from said X-ray generator and transmitted through said subject at a specified collection timing, wherein said X-ray generator and said X-ray detector are configured to be rotatable about said subject; a controller configured to control the timing of exposing said X-rays from said X-ray generator so as to supply a voltage and current to said X-ray generator to cause said X-ray generator to expose said X-rays when said X-ray generator exposes said X-rays, to control the collection timing to cause said X-ray detector to continuously collect said projection data at said specified collection timing, and to cause additional information representing the state of exposure of said X-rays to be added to each projection data that has been collected by said X-ray detector at said specified collection timing; an identifying part configured to identify the projection data to be used for generating image data, based on said additional information, upon receiving said each projection data to which said additional information has been added; and an image generator configured to generate the image data using said projection data that has been identified by said identifying part; wherein: said controller is further configured to cause exposure information representing whether said X-rays have been exposed by said X-ray generator to be added to each projection data as said additional information; and said identifying part is further configured to identify the projection data collected by said X-ray detector at the timing at which said X-rays have been exposed, based on said exposure information, upon receiving said each projection data to which said exposure information has been added.