Roberto Ceccato is Electrical Engineer from the Polytechnical School of University of São Paulo with a minor degree in Biomedical Engineering, currently taking a PhD. His areas of interest are dynamics and control of biomedical systems, biomedical signal processing and biomedical images. For the last two years his major dedication was on research involving Ultrasonic Tomography, especially on enhancement of refracted ray-path model (RRPM) in transmission-based ultrasound tomography having a sponsorship from the Brazilian National Council for Scientific and Technological Development. He is also part of the Biomedical Engineering Laboratory at USP.