G PHYSICS
G06 COMPUTING OR CALCULATING; COUNTING
G06T IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
G06T11/00 2D [Two Dimensional] image generation
G06T11/003 Reconstruction from projections, e.g. tomography
G06T11/005 Specific pre-processing for tomographic reconstruction, e.g. calibration, source positioning, rebinning, scatter correction, retrospective gating