Free-breathing cine DENSE MRI using phase cycling with matchmaking and stimulated-echo image-based navigators.

ABSTRACT:

Purpose

This study aimed to develop a self-navigated method for free-breathing spiral cine displacement encoding with stimulated echoes (DENSE), a myocardial strain imaging technique that uses phase-cycling for artifact suppression. The method needed to address 2 consequences of motion for DENSE: striping artifacts from incomplete suppression of the T₁ -relaxation echo and blurring.

Methods

The method identifies phase-cycled spiral interleaves at matched respiratory phases by minimizing the residual signal due to T₁ relaxation after phase-cycling subtraction. Next, the method reconstructs image-based navigators from matched phase-cycled interleaves that are comprised of the stimulated echo (ste-iNAVs). Ste-iNAVs are used for motion estimation and compen

SUBMITTER: Cai X 

PROVIDER: S-EPMC6107388 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature