Dual-excitation flip-angle simultaneous cine and T₁ mapping using spiral acquisition with respiratory and cardiac self-gating.

ABSTRACT:

Purpose

To develop a free-breathing cardiac self-gated technique that provides cine images and B1+ slice profile-corrected T₁ maps from a single acquisition.

Methods

Without breath-holding or electrocardiogram gating, data were acquired continuously on a 3T scanner using a golden-angle gradient-echo spiral pulse sequence, with an inversion RF pulse applied every 4 seconds. Flip angles of 3° and 15° were used for readouts after the first four and second four inversions. Self-gating cardiac triggers were extracted from heart image navigators, and respiratory motion was corrected by rigid registration on each heartbeat. Cine images were reconstructed from the steady-state portion of 15° readouts using a low-rank plus sparse reconstruction. The T₁ maps were

SUBMITTER: Zhou R 

PROVIDER: S-EPMC8849625 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature