A method of and a system for spectral correction in multi-energy computed tomography are provided to correct reconstructed images, including high-energy CT images and Z (effective atomic number) images, for spectral variations, which include time variations on a scanner due to HVPS drift and scanner...http://www.google.co.uk/patents/US7224763?utm_source=gb-gplus-sharePatent US7224763 - Method of and system for X-ray spectral correction in multi-energy computed tomography