Localizing Implanted Fiducial Markers using Undersampled co-RASOR MR Imaging
The goal of this work was to use an undersampled, dual-plane centre-out radial sampling acquisition pulse sequence, with off-resonance reception, to localize fiducial markers with reduced acquisition time. Two iterative reconstruction techniques, conjugate gradient CG-SENSE and the variational penalty Total Generalized Variation (TGV), were investigated to minimize the undersampling artifacts in off-resonant radialimaging. Simulations of a field perturber were performed at sub-millimeter resolution and reconstructed to display signal pileups that can be radially compressed towards the geometric center of the perturber for high contrast visualization, but contrast is non-recoverable as the echo time increases.
Source: Magnetic Resonance Imaging - Category: Radiology Authors: Evan McNabb, Raimond Wong, Michael D. Noseworthy Source Type: research