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Fast quantitative microwave imaging based on measured point spread functions and inversion in real space

Experimental validation is carried out for the recently developed real-time quantitative imaging method which exploits direct inversion in real space. The electrical properties of the dielectric target are reconstructed using a resolvent kernel in the forward model which is extracted from the calibration measurements of the system point-spread functions. Since the method does not need analytical or numerical approximations of the forward model, it is particularly valuable in near-field imaging.