And since this is for awesome as well as funny, I figured I'd post this. It's my research group making the news a few months ago. How awesome is that.
http://news.bbc.co.uk/1/hi/health/7965364.stmNot sure if you can see the image without a subscription to Science, but I think you can. 
A is a 
single MRI scan with the enhancement, 
B is several hundred MRI scans (over a wider area too) without the enhancement. Just look at the signal to noise on this, to get the first image without the signal enhancement would take over 3 months of aquisition time, and you can't really expect your patient to stay in an MRI scanner for that long, can you.
