CAT Scan fun

I went to Halton Hospital today to get a scan. I was expecting to be there for hours and also expecting to get some sort of dye injected into my veins.
I waited for about 20 mins and then my name was called. I went into the scanner room and was told to lie on my front on the scanner bed. I was put into the scanner, arse first and a robotic voice told me to hold my breath. I was scanned and then the whole thing was repeated. I was on the bus home, less than 10 minutes later. No injections or anything. I didn't even get undressed. How cool is that?