Background phase induced steady-state effects in velocity quantification using phase-contrast MRI.

ABSTRACT:

Purpose

Flow quantification using phase-contrast (PC) MRI is based on steady-state gradient echo (GRE) sequences and is hampered by spatially varying background phase offsets. The purpose of this work was to investigate the effect of steady-state disruptions during PC-MRI GRE sequences on these background phases. Based on these findings, a specific sequence and timing is suggested, and caution is expressed when using typical correction algorithms.

Methods

Steady-state responses in stationary tissue were investigated in different prospectively triggered through-plane phase-contrast MRI sequence. Different spoiling methods (gradient spoiling/FISP versus gradient+RF spoiling/FLASH) and interleaving of flow encoding gradients (every TR vs. every ECG cycle) were investigated usin

SUBMITTER: Fischer C 

PROVIDER: S-EPMC11782709 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature