Patent ID: 6996206
Filing Date: 2006-02-07
Classification: A61B

Abstract:
1. A method for performing reference normalization for a measured projection created by an imaging system that includes a radiation detector array with a right and left edge, the method comprising: receiving a projection dataset created by the imaging system in response to a varying x-ray tube current, the projection dataset including a view; calculating predicted fluxes for right and left sets of reference channels within the view, wherein the right set of reference channels is located proximate at the right edge of the detector array and the left set of reference channels is located proximate to the left edge of the detector array; calculating average actual fluxes for the right and left sets of reference channels; determining a reference correction value for the view based on the predicted reference fluxes and the average actual fluxes; substituting a previous reference correction value scaled by an x-ray tube current change for the reference correction value if the right and left sets of reference channels are blocked; and applying the reference correction value to the view.