Patent ID: 7116749
Filing Date: 2006-10-03
Classification: A61B,G21K,Y10S

Abstract:
1. A method of acquiring multispectral x-ray projection data of an object with an imaging apparatus, comprising: (a) Selecting an x-ray source x-ray radiation spectral characteristics by adjusting at least two parameter values from the group consisting of (i) an x-ray tube target track material, (ii) a generator peak kilo-voltage, (iii) an x-ray tube current, (iv) a filter composition, and (v) an x-ray tube focal spot size; (b) projecting, in a first relative orientation between the object and x-ray imaging apparatus, x-ray radiation according to selecting step (a) through the object and acquiring a first set of measurements defining a first set of projection lines through the object; (c) for at least one additional relative orientation between the object and the x-ray imaging apparatus, projecting x-ray radiation according to selecting step (a) through the object and acquiring an additional set of measurements defining an additional set of projection lines through the object, the additional set of projection lines overlapping, at least in part, with the first set of projection lines; and (d) repeating steps (a) through (c) for at least two different parameter values; wherein multispectral sets of projection data are acquired for the object at a multiplicity of x-ray spectra in a single scan for the object through the imaging apparatus.