Patent ID: 8913805
Filing Date: 2014-12-16
Classification: G06T

Abstract:
1. A processor-implemented method for forward and back projection for image construction, the method comprising: computing projected coordinates of a plurality of 3D voxels on a detector surface; approximating 2D footprints of said plurality of voxels as separable functions, said separable functions being a computational product of a 1D axial footprint function and a 1D transaxial footprint function; approximating 2D detector blur as a computational product of a 1D axial blur function and a 1D transaxial blur function; and determining the contribution of said plurality of voxels to detector cells or vice versa using computational sums and products of said 1D axial footprint function, said 1D transaxial footprint function, said 1D axial blur function, and said 1D transaxial blur function in accordance with said projected coordinates.