Whole-heart T₁ mapping using a 2D fat image navigator for respiratory motion compensation.

ABSTRACT:

Purpose

To combine a 3D saturation-recovery-based myocardial T₁ mapping (3D SASHA) sequence with a 2D image navigator with fat excitation (fat-iNAV) to allow 3D T₁ maps with 100% respiratory scan efficiency and predictable scan time.

Methods

Data from T₁ phantom and 10 subjects were acquired at 1.5T. For respiratory motion compensation, a 2D fat-iNAV was acquired before each 3D SASHA k-space segment to correct for 2D translational motion in a beat-to-beat fashion. The effect of the fat-iNAV on the 3D SASHA T1 estimation was evaluated on the T₁ phantom. For 3 representative subjects, the proposed free-breathing 3D SASHA with fat-iNAV was compared to the original implementation with the diaphragmatic navigator. The 3D SASHA with fat-

SUBMITTER: Nordio G 

PROVIDER: S-EPMC6791811 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature