 An echocardiography is a technique that's been around for several decades. It was actually first developed in the First World War as a sonar type technology. So it's based on sound waves that bounce off different organ systems inside the human body. There's no radiation and it's not invasive. It's a very powerful tool that we can use in research because it tells us about the function and the structure of the heart. So it's exciting for the students because they get hands-on experience with these imaging techniques which are entirely safe. There's no radiation to them or to the people that they scan. It's great for us to be able to use that because it's real hands-on physiology which means that we're actually seeing the structure and the function of things change in front of their eyes and that's a really powerful teaching tool.