Patent ID: 7502440

Claim:
A radiodiagnostic apparatus comprising: a data collection unit configured to collect a first projection data obtained at a projection angle within a projection angle range in which the whole portion of an object is within an effective acquisition field of a detector, and configured to collect a second projection data obtained at a projection angle within a projection angle range in which a part of a truncated portion is out of the effective acquisition field of the detector, when the effective acquisition field of the detector is defined as a range limited by a collimator; a primary correction unit configured to calculate a plurality of primary extrapolation expression candidates for correcting said second projection data on the basis of a difference between a total sum value of said first projection data and a total sum value of said second projection data so as to obtain a plurality of third projection data candidates formed from said second projection data and said plurality of primary extrapolation expression candidates and configured to obtain third projection data from said plurality of third projection data candidates on the basis of a difference between a center of gravity of the third projection data estimated from the center of gravity of said first projection data and a center of gravity of said plurality of third projection data candidates; a body contour detection unit configured to detect position information of a body contour in said second projection data on the basis of said third projection data; a secondary correction unit configured to acquire a secondary extrapolation expression for correcting said second projection data on the basis of said position information of the body contour and configured to obtain fourth projection data formed from said second projection data and said secondary extrapolation expression; and a reconstruction unit configured to reconstruct an image on a slice-by-slice basis on the basis of said first projection data and said fourth projection data.