Possible Patient Early Diagnosis by Ultrasonic Noninvasive Estimation of Thermal Gradients into Tissues Based on Spectral Changes Modeling. - Ivonne Bazán; Antonio Ramos; Héctor Calás; Alfredo Ramírez; Ricardo Pintle; Tomás E. Gómez; Carlos Negreira; Francisco J. Gallegos Funes; Alberto J. Rosales (Comput. Math. Methods Medicine, 2012)