You can not diagnose FMS with the use of an MRI. I would ask the party that stated this, for the study or medical article that discusses this "new" approach. FMS is determined by palpating known tender points and once you have a certain number of tender points that hurt (11 of 18), then you have FMS. The pressure applied to the tender points is the amount of pressure that will change the color of the skin under your finger nail when you press on it. See the link below for further discussion:
http://ww2.arthritis.org/research/Bu.../Diagnosis.asp