As summarized in their paper , this method does not consider the acoustic refraction effect resulted from the heterogeneous SV distribution.
In this realistic situation, the acoustic refraction must be taken into account.
In this paper, we propose a new iterative method based on the TRM technique and FMM-SART algorithm to accurately reconstruct the microwave absorption properties for MITAT when the acoustic refraction is taken into account.
For this situation, the acoustic refraction must be considered.
However, it will not be robust when the acoustic refraction is taken into consideration.
Conventional TRM will not be able to solve the phase distortion problem caused by acoustic refraction. Obviously, the proposed method mitigates the phase distortion and greatly enhances the spatial resolution for this situation.