title: An improved real-time navigator gating algorithm for reducing motion effects in coronary magnetic resonance angiography.
abstract: The phase ordering with automatic window selection (PAWS) algorithm for respiratory gating in magnetic resonance imaging is improved by further smoothing motion distribution in k-space. This is achieved by requiring that the displacement discontinuities in k-space and the range of displacement during the acquisition of the center 30% region of k-space are limited to a fraction (1/3 in this study) of the gating window. Simulation results and in vivo imaging experiments suggest that these modifications reduce the amount of artifacts at a reasonable cost of additional scan time as compared to the original PAWS algorithm.
authors.affiliation: Department of Radiology, University of Pittsburgh, 200 Lothrop Street, Pittsburgh, PA 15213, USA.
authors.forename: A
authors.initials: A
authors.lastname: Nuval
authors.forename: T D
authors.initials: TD
authors.lastname: Nguyen
authors.forename: R
authors.initials: R
authors.lastname: Watts
authors.forename: Y
authors.initials: Y
authors.lastname: Wang