Focused navigation for respiratory-motion-corrected free-running radial 4D flow MRI.

ABSTRACT:

Purpose

To validate a respiratory motion correction method called focused navigation (fNAV) for free-running radial whole-heart 4D flow MRI.

Methods

Using fNAV, respiratory signals derived from radial readouts are converted into three orthogonal displacements, which are then used to correct respiratory motion in 4D flow datasets. Hundred 4D flow acquisitions were simulated with non-rigid respiratory motion and used for validation. The difference between generated and fNAV displacement coefficients was calculated. Vessel area and flow measurements from 4D flow reconstructions with (fNAV) and without (uncorrected) motion correction were compared to the motion-free ground-truth. In 25 patients, the same measurements were compared between fNAV 4D flow, 2D flow, navigator-gated C

SUBMITTER: Falcao MBL 

PROVIDER: S-EPMC10149606 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature