A Technique for Projection Space Reconstruction of Dual Source, Dual Energy Spiral CT Data

Technology #2008-141

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Researchers
Cynthia H. McCollough Ph.D.
Lifeng Yu Ph.D.
Managed By
Barb J. Keller
Patent Protection
US Patent Pending
US Patent Pending

Dual energy CT performed using dual source scanner geometry is limited to dual energy algorithms that operate using reconstructed images. This limits the ability to remove beam hardening artifacts, which are introduced during the image reconstruction process. The novel algorithm disclosed here allows for realignmnet of the high- and low-energy datasets, which are 90degrees out of phase, such that raw-data-space, dual energy processing can be performed. This allows for spiral dual energy dual source CT data to be used to create virtual monochromatic images, in which beam hardening artifacts have been eliminated.