A method for reconstructing tilted cone beam data acquired using a CT
apparatus. The CT apparatus has a gantry and a table. The gantry has an
x-ray source and a detector array with columns and rows. The gantry is
tilted at a gantry tilt angle with respect to the table and a plurality
of projection data is acquired using the CT apparatus. Fan-parallel
rebinning is performed on a row by row basis to form a plurality of
reconstructed pixels. The coordinate locations of the plurality of
reconstructed pixels are adjusted based on the gantry tilt angle and used
to form a reconstructed image.