Estimate B1+ transmit field from T1w

Dear all,

I am conducting a study using the myelin maps obtained with the HCP structural preprocessing pipeline using as input T1w MPRAGE and T2w images.To conduct group comparisons between myelin maps is necessary perform a correction of the B1+ transmit field (Glasser et al., 2022, Neuroimage). Unfortunately, our MRI protocol does not include a specific acquisition of B1+ maps.

I would like to know if there is a way for me to estimate B1(+) inhomogeneities from my T1w MPRAGE images in order to get B1+ maps.

Thank you very much in advance.

Best regards,