They are not fun. First thing I do is check in, fill out gobs of paperwork (even though I've had this same procedure done multiple times) and put on those stylish hospital pajamas. I've gotten to the point where I don't where any jewelry because ALL metal has to be removed. Wearing metal while in a giant magnet is NOT a good idea and a mistake I have made only once and never repeated--fortunately there were no explosions :)
Next, they stick me with an I.V. Halfway through the MRI contrast dye is added because my procedure is always with and without contrast.
Finally it's into the tube, and I mean tube. Those nice, open, big machines that you see on t.v. are nothing like the one i get squeezed into. This pic is fairly accurate:
Add to that, because it is a head scan I also get to wear the cool "darth vader" mask:
These masks also have little stabilizers they place against your face to keep you from moving your head. SO, earplugs are in, because MRIs are LOUD (quick sample here--turn down volume): http://www.youtube.com/watch?v=8oI9YnhPNcQ , Vader mask is on, panic button in hand, and hopefully I'm on the board enough that I'm not going to fall off the sides. I get slid into the tube (see above pic) and the MRI starts. I get about 20 minutes of those wonderful sounds before they pull me out to inject contrast then about another 10 minutes of sci-fi noises and the procedure is done!
Results take 24-48 hours to get to my doctor (unless they discover a walnut sized tumor than they tend to let you know the same day) and I find out results at next appointment with him. Currently my doc is Dr. Wilson. He runs the Cyberknife program here in Austin which is a pretty amazing technology. Check it out:http://www.cyberknife.com/cyberknife-overview/what-cyberknife.aspx
Hope this has answered some questions and if you have to have one done and are a little nervous check out the site below or ask me questions :)