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. Raaijmakers^1,2, 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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