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Abstract #4072

MR based transfer matrix determination for a linear implant by joint estimation of the incident and scattered B$$$^+_1\hspace{2mm}$$$fields.

Janot P. Tokaya1, Alexander J.E. Raaijmakers1,2, Alessandro Sbrizzi1, Peter R. Luijten1, and Cornelis A.T. Berg1

1Center for Image Sciences, UMC Utrecht, Utrecht, Netherlands, 2Biomedical Image Analysis, Eindhoven University of technology, Eindhoven, Netherlands

Two findings that are steps towards fully MR-based TF determination in realistic situations are presented. Firstly, the transfer matrix, that is an extension of the transfer function (TF), can describe the RF response of an implant in a human model. Secondly, a joint minimization of the incident field and the scattered field, determined with the transfer matrix, can describe measured and simulated complex B$$$_1^+$$$ distributions in a phantom with a linear implant present. The TM and TF result from this minimization, which enables their determination from a single MRI acquisition with the implant in place.

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