摘要: La tecnologia del ultrasonido nace en 1880 con el desarrollo de los efectos piezoelectricos. Luego fue aplicada forma SONAR (Sound Navigation and Ranging) durante la segunda guerra mundial para deteccion barcos, submarinos y aviones guerra. emision las ondas se obtiene por medio cristales que son sometidos a una corriente electrica logrando vibren, recepcion estas logra cuando retornan nuevo al chocar tejidos. Estos estan contenidos dispositivos llamados transductores o sondas ecograficas conectadas un monitor. (Perkings 2000, Ginther et al. 1989)
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