Apparently the artist, sivu, spent several hours singing in an MRI machine to make the film. Fascinating, beautiful and a little bit ookey. Like so many of the best things in life.
I wish I could remember where I first saw the link; that'll teach me for leaving it in an 'I'll look at that in a minute...' tab for two days. I really must stop with the procrastination/'multi-tasking'(read skatter-brained-ness) already.