Feasibility Study for Dual Phase Free Breathing 3D bSSFP MRA With Preserved Eddy-Current Tolerance With Adaptive k-Space Lengths (PETAL) Acquisition.

ABSTRACT:

Purpose

To demonstrate the feasibility of a novel dual-phase self-navigated, free-breathing balanced steady-state free-precession whole-heart MRA acquisition for aortic annulus size measurement using a Cartesian trajectory that mitigates eddy-current artifacts by minimizing k-space jumps between consecutive readouts with predictable scan times.

Methods

The proposed method uses a trajectory with Preserved Eddy-current Tolerance with Adaptive k-space Lengths (PETAL) that enables the acquisition of multiple navigators per heartbeat to address respiratory motion throughout a 330-510 ms acquisition window across different cardiac phases. Imaging was performed in 15 healthy volunteers on a 3 T MR system using a sequence compiled in Pulseq. Images were reconstructed in systole and

SUBMITTER: Ribeiro Salles Moura T 

PROVIDER: S-EPMC12850613 | biostudies-literature | 2026 Apr

REPOSITORIES: biostudies-literature