Patent ID: 7336758

Claim:
A radiography system comprising: a scanner that scans a subject's scan field with a radiation so as to acquire projection data of the subject, wherein the scanner executes a main scan to acquire first projection data as the projection data by scanning the subject's scan field with radiation, and a preliminary scan to acquire second projection data as the projection data by scanning the subject's scan field with radiation in preparation for the main scan prior to execution of the main scan; an image construction unit that reconstructs in real time a two-dimensional first image of the subject on the basis of the first projection data in real time with execution of the main scan; and a display unit on which the first image constructed by the image construction unit is displayed in real time, wherein: the image construction unit constructs a three-dimensional second image of the subject on the basis of the second projection data; and the first image and second image are displayed on the screen of the display unit in real time with the execution of the main scan while being juxtaposed to each other.