Complex B1+ field predictions to evaluate Electrical Properties Tomography reconstructions.

Motivation: Electrical properties (EPs) are reconstructed from complex B1+ maps. In-vivo reconstructed EPs values presented in literature show large variations, reducing the confidence in the quality/accuracy of the reconstruction methods. Goal(s): To develop a method to compute complex B1+ fields from EPs maps, which can the verify accuracy of EPs reconstructions. Approach: Complex B1+ maps are predicted using a finite difference-based approach. The difference between the predicted and measured fields is used as surrogate error of the estimated input EPs. Results: The method shows accurate complex B1+ field reconstructions in 2 minutes and the ability to localize errors in the input EPs maps. Impact: Complex B1+ fields are predicted using tissue electrical properties maps as input. This method provides a way to assess the quality/accuracy of in-vivo electrical properties reconstructions, providing a means to gain confidence in the reconstructed electrical properties values.