MOTION CORRECTION WITH LOCALLY LINEAR EMBEDDING FOR HELICAL PHOTON-COUNTING CT

Abstract: a method of motion correction image reconstruction for photon-counting ct images includes scanning a subject via a photon-counting ct scanner device to obtain measured projection data; performing, via motion correction circuitry of the motion correction system, a lle motion correction algorithm on the measured projection data to obtain motion correction data; generating, via reconstruction circuitry of the motion correction system, reconstructed image data from the motion correction data; and outputting corrected image data based, at least in part, on the reconstructed image data. a binary bad pixel mask is applied to exclude contributions from the bad pixels to the measured projection data. an unreliable volume mask is applied to exclude contributions from x-ray beams that passed through unreliable portions of the reconstructed image data. a virtual static object removal algorithm is performed to remove a static object from the measured projection data.

Inventor(s): Ge Wang, Mengzhou Li

CPC Classification: G06T11/005 ({Specific pre-processing for tomographic reconstruction, e.g. calibration, source positioning, rebinning, scatter correction, retrospective gating})

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