A fast navigator (fastNAV) for prospective respiratory motion correction in first-pass myocardial perfusion imaging.

ABSTRACT:

Purpose

To develop and evaluate a fast respiratory navigator (fastNAV) for cardiac MR perfusion imaging with subject-specific prospective slice tracking.

Methods

A fastNAV was developed for dynamic contrast-enhanced cardiac MR perfusion imaging by combining spatially nonselective saturation with slice-selective tip-up and slice-selective excitation pulses. The excitation slice was angulated from the tip-up slice in the transverse plane to overlap only in the right hemidiaphragm for suppression of signal outside the right hemidiaphragm. A calibration scan was developed to enable the estimation of subject-specific tracking factors. Perfusion imaging using subject-specific fastNAV-based slice tracking was then compared to a conventional sequence (ie, without slice tracking) in

SUBMITTER: Mooiweer R 

PROVIDER: S-EPMC7898590 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature