Craig, I work at an MRI center ( we also do Cat Scans and X-rays etc.) Since MRI is really just a big magnent they do want all metal removed (gold and silver jewlrey is OK as long as it's not over the area to be imaged) Most places don't give you a gown, just wear some sweats with no metal on them. MRI's can get cold, so sweats are preferable. The contrast, or dye is NOT radioactive at all. There is no radiation whatsoever with MRI. The dye used is GADOLINIUM, very safe and reactions are rare (our MRI Tech has seen 2 or 3 in 15+ years). The Gad serves to highlight blood vessels and gives a much better scan (more info). Depending on exactly what studies your Doc wants, plan on at least an hour. MRI is noisy, so you will get ear plugs, if it's not your head you may be able to listen to music. Call the MRI place and ask to speak with one of the Techs about your exam and they can help you out. If you are really apprehensive about it, get someone to drive you and ask you Doc for a little something to sedate you. If you can't hold very still for entire exam, the study won't be as good and your stay will be longer if they have to repeat anything. Hope this helps, PM me if you need any more info, be happy to talk on the phone.