Third trimester fetal 4D flow MRI with motion correction.

ABSTRACT:

Purpose

To correct maternal breathing and fetal bulk motion during fetal 4D flow MRI.

Methods

A Doppler-ultrasound fetal cardiac-gated free-running 4D flow acquisition was corrected post hoc for maternal respiratory and fetal bulk motion in separate automated steps, with optional manual intervention to assess and limit fetal motion artifacts. Compressed-sensing reconstruction with a data outlier rejection algorithm was adapted from previous work. Pre- and post-motion correction comparison included qualitative visibility of vasculature on phase-contrast MR angiograms (five-point Likert scale), conservation of mass of the aortic isthmus, ductus arteriosus, and descending aorta, and coefficient of variation of flow along the descending aorta.

Results

Twenty-nine third tr

SUBMITTER: Tompkins RM 

PROVIDER: S-EPMC11893028 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature