Three-dimensional heart locator and compressed sensing for whole-heart MR angiography.

ABSTRACT:

Purpose

We sought to develop a whole-heart magnetic resonance angiography technique with three-dimensional (3D) respiratory motion compensation and reduced scan time.

Methods

A novel respiratory motion compensation method was implemented that acquires a 1D navigator (NAV) and a low-resolution 3D-image of the heart (3D-LOC) just before the angiography data. The central 10% of SSFP k-space was fully acquired using NAV-gating, and then 10% of peripheral k-space was randomly undersampled to complete the scan. Spatial registration of the 3D-LOC information was used to correct the central and peripheral k-space lines for the bulk respiratory motion in three dimensions, and then the remaining k-space data was estimated using compressed sensing (CS). Ten volunteers each underwent tw

SUBMITTER: Moghari MH 

PROVIDER: S-EPMC5292940 | biostudies-literature | 2016 May

REPOSITORIES: biostudies-literature