Hi iv had an MRI on my head in both my pregnancies due to a tumor on my pituitary gland and my consultant said its perfectly safe but have to be past 12 weeks to be on the safe side and only one MRI during the whole pregnancy. im sure you will be fine but don't by shy on speaking to your hospital on their policies of MRI during pregnancy they are there to help a senior radiographer would be able to help as well. I've never had dye injected for an MRI though they only do this if they really can't see what they need to i wouldn't personally have this done. Hope this helps x