http://media.libsyn.com/media/lifelines/Episode_26__Invention_and_Impact_of_Ultrasound.mp3 Episode 26: Invention and Impact of Ultrasound http://feedproxy.google.com/~r/lifelinestv/~3/gd0HQ6oOkWQ/index.php 2009-10-07 http://www.odeo.com/uploads/0026/2397/lifelines300x300_medium.jpg