Deborah showed us a video in one of her lectures about tracking sensors.
We were asked as a task to think of new ways that this technology could be used. The video reminded me of a scene from a TV show called Firefly. In one of the episodes the doctor character uses a tool which displays a human brain as a 3D interactive holographic image.
In the video Jonny Lee uses an LCD screen to display a more detailed map ontop of a large projection of a basic map. I think if you combined this with 3D holographic x-ray it could help train surgens with complex operations. It could also be used to simulate risky operations that are about to be undertaken so the surgen can play though the senarios that may happen during the precigiour and practise and problems that might occure.