Did you get the mris with contrast? If you get the regular mri then unless they use the correct sequences (Stir is one of them, I don't remember the others but you can search this site for threads about it) then the inflammation may not show up. Also try to get the mris when you are in a flare, but I know that's not always easy to do. And get a mri with a good magnet, no open mris, and a level 3 is the best magnet.
