Patent Document ID: 20060083345
Application ID: 10966415
Patent Status: 0

Claim One:
1. A method for reconstructing tilted cone beam data acquired using a computed tomography (CT) apparatus having a gantry and a table, said gantry comprising an x-ray source and a detector array having columns and rows, said method comprising: acquiring a plurality of projection data using the CT apparatus wherein said gantry being tilted at a gantry tilt angle with respect to said table, wherein said projection data comprises a first coordinate system having a z′-axis corresponding to said gantry tilt angle and said CT apparatus comprising a second coordinate system having a z-axis corresponding to a movement of said table, said z′-axis and said z-axis being different, and further moving said table along said z-axis while acquiring said projection data; calculating a distance said table travels along said z-axis, said distance comprising components in two different directions relative to said first coordinate system; fan-parallel rebinning said projection data to form a plurality of reconstructed pixels, said fan-parallel rebinning being performed on a row by row basis; and adjusting coordinate locations of said plurality of reconstructed pixels based on said gantry tilt angle and said distance, said plurality of reconstructed pixels being utilized to form a reconstructed image