Note: I originally posted these in 2015 but I moved them up to go with newer posts from EMCrit on the subject.
These great podcasts are from the YouTube channel of UltrasoundPod which I have subscribed to. Also be sure to visit the website of Matt Dawson, Mike Mallin, and Mike Stone at www.ultrasoundpodcast.com which has awesome resources.
The clinically useful information begins at 10:15. So skip to there.