Looks like they're trying on sheep earlier this year. http://www.biotechniques.com/news/Breaking-Boundaries-Ultrasound-Treatments-for-Alzheimers-Disease/biotec

Looks like they're trying on sheep earlier this year. http://www.biotechniques.com/news/Breaking-Boundaries-Ultrasound-Treatments-for-Alzheimers-Disease/biotechniques-363211.html#.WB4iqdUrKVM http://www.biotechniques.com/news/Breaking-Boundaries-Ultras... > Leinenga is also trying to apply the technique to sheep since their skulls are similar in thickness to human skulls. The larger sheep brain is also closer in size and shape to human brains as well. Having a similar model is important for developing ultrasound technology, because the physics can differ in a mouse versus a human due to the difficulty of transmitting through a thicker human skull.