biostudies-literatureBrackenier YWellcome Trust817-831https://www.ebi.ac.uk/biostudies/studies/S-EPMC9324873biostudies-literatureUnknown88(2)<h4>Purpose</h4>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.<h4>Theory and methods</h4>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 rMagnetic resonance in medicineData-driven motion-corrected brain MRI incorporating pose-dependent B₀ fields.PMC9324873WT 201526/Z/16/Z203148/Z/16/Z201526/Z/16/ZWT 203148/Z/16/ZWT203148/Z/16/ZWilkinson TCordero-Grande LBrackenier YMalik SJHajnal JVPrice ATomi-Tricot RBridgen PDe Vita EfalseData-driven motion-corrected brain MRI incorporating pose-dependent B₀ fields.<h4>Purpose</h4>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.<h4>Theory and methods</h4>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 r2022-01-01T00:00:00Z2022 Aug2025-04-04T19:27:28.397Z2025-04-04T19:27:28.397ZS-EPMC93248733552621210.1002/mrm.29255