Data-driven motion-corrected brain MRI incorporating pose-dependent B₀ fields.

ABSTRACT:

Purpose

To develop a fully data-driven retrospective intrascan motion-correction framework for volumetric brain MRI at ultrahigh field (7 Tesla) that includes modeling of pose-dependent changes in polarizing magnetic (B₀ ) fields.

Theory and methods

Tissue susceptibility induces spatially varying B₀ distributions in the head, which change with pose. A physics-inspired B₀ model has been deployed to model the B₀ variations in the head and was validated in vivo. This model is integrated into a forward parallel imaging model for imaging in the presence of motion. Our proposal minimizes the number of added parameters, enabling the developed framework to estimate dynamic B₀ variations from appropriately acquired data without r

SUBMITTER: Brackenier Y 

PROVIDER: S-EPMC9324873 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature