Preconditioning of projected SIRT algorithm for electromagnetic tomography

For Electromagnetic Tomography (EMT) Techniques, image reconstruction is one of the crucial steps, which directly affects the quality of reconstruction and real-time performance of the EMT system. Following analyzing a pre-iterative method for SIRT (simultaneous iterative reconstruction technique) algorithm, a preconditioning for the projected SIRT is proposed to accelerate the image reconstruction speed and alleviate the ill-posed nature of the EMT inverse problem. Experimental tests confirm that the quality of the reconstructed images using the preconditioning algorithm is enhanced with only a small number of iterations required.

► The equivalent SIRT version is formulated.
► The projected SIRT is used for improving its convergence quality.
► A pre-iterative method is proposed for EMT.
► A preconditioning method is deduced for acceleration and reconstruction improvement.
► Experimental tests are carried out to validate the mentioned methods.