Bias in Breast B0 Mapping; Shimming Lipid Rich Parts of the Body at 7T

Vincent Oltman Boer¹, Mariska P. Luttje¹, Peter R. Luijten¹, Dennis W.J. Klomp¹

B₀ field maps can be obtained rapidly using dual echo gradient echo sequences. However in lipid rich tissue this is complicated due to the presence of multiple spectral components, hence requiring many more echoes and thereby increasing scantime. Here we demonstrate that by incorporating the seven most intense lipid resonances in the breast, in-phase echo times can be obtained enabling B₀ field mapping with dual echo gradient echo imaging in the human breast at 7T without a bias in lipid tissue.