Mitigation of near-band balanced steady-state free precession through-plane flow artifacts using partial dephasing.

ABSTRACT:

Purpose

To mitigate artifacts from through-plane flow at the locations of steady-state stopbands in balanced steady-state free precession (SSFP) using partial dephasing.

Methods

A 60° range in the phase accrual during a TR was created over the voxel by slightly unbalancing the slice-select dephaser. The spectral profiles of SSFP with partial dephasing for various constant flow rates and during pulsatile flow were simulated to determine if partial dephasing decreases through-plane flow artifacts originating near SSFP dark bands while maintaining on-resonant signal. Simulations were then validated in a flow phantom. Lastly, phase-cycled SSFP cardiac cine images were acquired with and without partial dephasing in six subjects.

Results

Partial dephasing decreased the stre

SUBMITTER: Datta A 

PROVIDER: S-EPMC6820691 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature