Three-dimensional microwave breast imaging using least electrical path method

A three-dimensional microwave imaging algorithm using least-electrical-path (LEP) method is presented. The algorithm is designed for the ultra-wideband imaging system for breast cancer detection and localization. By considering the signal refraction on the borders of the imaged breast, this developed algorithm provides an accurate estimation for the pulse delay from a hypothesis point within the imaged region. It, thus, provides an accurate estimation of the tumor´s position. The proposed method is validated using full-wave simulations.