Hi and welcome to the Chiari forum.
Like Lizzy mentioned in the above post, many chiari drs will review MRI's...some do it for free while others do it for a minimal fee.
I know Dr Oro will work on non virgin back and necks...his words not mine....I had the pleasure to meet him at a chiari conference and wished I could have traveled to see him, but I was also lucky to meet some other chiari drs and it was one of them that eventually lead me to my NS and surgery.
http://www.medhelp.org/posts/Chiari-Malformation/LIST-OF-CHIARI-SPECIALISTS/show/1293483
Here is a link to the thread Lizzy mentioned in the above post.....
and like she said, do research on all drs to find one that is right for ur BF.
Glad to have u here, but sorry for the reasons that brought u.....
"selma"