A friend of mine has one of those bone stimulators that are implanted under the skin. It was supposed to help with her pain, but didn't. Can you have an MRI when those things are in? She had a 3 level fusion done about 3 years ago---6 screws and no cage. She has been in terrible pain ever since the surgery. I'm trying to convince her to go see another doc 'cause she says they say they cannot do anything else for her? Would they really do a fusion like that and not put in a cage? She is only 42 and is almost totally disabled (although they have not approved her for disability). After spending the day with her, I feel so very blessed and thankful. Just wanted to see what you guys think.