Variable-flip-angle 3D spiral-in-out turbo spin-echo imaging using concomitant gradient compensation and echo reordering at 0.55 T.

ABSTRACT:

Purpose

To develop single-slab 3D spiral turbo spin echo (spiral SPACE) for 1-mm³ isotropic whole-brain T₂-weighted imaging on a high-performance 0.55T scanner, with high scan efficiency from interleaved spiral-in-out trajectories, variable-flip-angle refocusing radiofrequency (RF) pulses, echo reordering, and concomitant-field compensation.

Methods

A stack-of-spirals (in-out waveforms) turbo-spin-echo acquisition was implemented with T₂-weighed contrast. Gradient infidelity was corrected using the gradient impulse response function (GIRF), and concomitant-field compensation was used to correct for phase errors among echoes and during the readout windows. To maintain a long echo train (˜600 ms) within each shot, variable-flip-angle refocusing

SUBMITTER: Wang Z 

PROVIDER: S-EPMC11782727 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature