Method and apparatus for reconstructing dielectric image using electromagnetic waves

An apparatus for reconstructing an image using electromagnetic waves, comprising:

• a measurement value acquisition block acquiring a measurement value of the electromagnetic waves that are radiated by a transmitting antenna and propagate through an image reconstruction region;
• a mesh setting block setting a plurality of predetermined meshes in the image reconstruction region;
• a matching system matrix generation block generating a matching system matrix using basis functions related to the plurality of predetermined meshes;
• a Green's function matrix generation block generating a smoothed Green's function matrix using the generated matching system matrix;
• an electromagnetic wave calculation block generating an electromagnetic wave calculation value through performing of a forward electromagnetic analysis with respect to the image reconstruction region on the basis of the generated smoothed Green's function matrix;
• an optimization determination block calculating an misfit error between the acquired electromagnetic wave measurement value and the generated electromagnetic wave calculation value, and checking whether the calculated misfit error satisfies a predetermined optimization determination condition;
• a parameter updating block generating a regularized Jacobian matrix using the matching system matrix, the image reconstruction mesh, and the smoothed Green's function matrix, and updating dielectric parameters at the coarse mesh using the generated regularized Jacobian matrix if the predetermined optimization determination condition is not satisfied;
• and
• an image reconstruction value generation block generating a reconstructed image in the image reconstruction region as a visualization file that is visually identifiable or a data file when the predetermined optimization determination condition is satisfied.