The use of the Algebraic Reconstruction Technique (ART) for imaging of dielectric targets in Radio Frequency Tomography

In this paper, we investigated the used of the Algebraic Reconstruction Technique to obtain images of dielectric targets. A standard implementation of ART has been modified so as to impose physical bounds on the image obtained. Our results show images that in general outperform reconstruction obtained with TSVD (or CG). Images are less noisy, more sharp, and the reconstructed shapes are in better agreement with the dimensions of the actual objects. However, ART is unable to reconstruct correctly a large object when it is not empty, showing an incorrect shape in the measurement data and simply not converging in the simulated data. This unexpected behavior is currently under investigation.