For those who are having a hard time knowing which imaging studies are recommended for the diagnosis of TOS this is a helpful article to print and bring to your Dr. This is an article from the American College of Radiology. It is the appropriateness criteria for diagnosing TOS.
http://www.acr.org/~/media/ACR/Docum...etSyndrome.pdf
Also here is a link to a radiologist who has developed a protocol specific to diagnose TOS. I have not had the MRI yet but I spoke with the radiologist on the phone and was impressed with the thoroughness of the MRI protocol.
http://www.tosmri.com/index.html
Hope this helps