Eddy current characterizations are needed for pre-emphasis implementations in dynamic shimming applications. However, since a high spatio-temporal sampling of the eddy current fields is required, this a challenging task. Image-based approaches are well-suited for this purpose, but require substantial acquisition times.
This work presents a 2D image-based sampling scheme, which is fast compared to existing 3D techniques and still provides sufficient information for an unambiguous pre-emphasis parameter reconstruction. Moreover, a model-based fit is proposed, which jointly applies the spatial and temporal eddy current model to the acquired data. It is shown, that this approach is well-suited for reducing fitting noise.
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