Motion robust high resolution 3D free-breathing pulmonary MRI using dynamic 3D image self-navigator.

ABSTRACT:

Purpose

To achieve motion robust high resolution 3D free-breathing pulmonary MRI utilizing a novel dynamic 3D image navigator derived directly from imaging data.

Methods

Five-minute free-breathing scans were acquired with a 3D ultrashort echo time (UTE) sequence with 1.25 mm isotropic resolution. From this data, dynamic 3D self-navigating images were reconstructed under locally low rank (LLR) constraints and used for motion compensation with one of two methods: a soft-gating technique to penalize the respiratory motion induced data inconsistency, and a respiratory motion-resolved technique to provide images of all respiratory motion states.

Results

Respiratory motion estimation derived from the proposed dynamic 3D self-navigator of 7.5 mm isotropic reconstruction reso

SUBMITTER: Jiang W 

PROVIDER: S-EPMC6474413 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature