Automatic Respiratory and Bulk Patient Motion Corrected 3D Fetal MRI.

ABSTRACT:

Purpose

To develop a framework (ACROBATIC) for correcting motion in 3D radial fetal MRI.

Methods

Data were simulated (N = 200) and acquired in utero (N = 11, gestational age: 32 ± 2 weeks). Motion due to maternal respiration was estimated by extracting a self-gating signal and applying focused navigation. Bulk motion was estimated by splitting the acquisition into sequential bins, reconstructing 3D volumes and applying rigid image registration. These combined motion estimates were used to correct k-space. Self-gating signals were compared to ground truth in simulations and an external sensor in utero. The cumulative position error (CPE) measured the accuracy of motion estimations relative to ground truth in simulations and relative sharpness measured the corresponding impact

SUBMITTER: Ferincz R 

PROVIDER: S-EPMC12850569 | biostudies-literature | 2026 Apr

REPOSITORIES: biostudies-literature