Mish, when my son was going through this, his orthopedist diagnosed from XRays, but when pain recurred, he ordered an MRI just to rule out problems that XRays would not pick up. Not sure if you are working with an experienced orthopedist, but I'd say after dealing with DS and watching a few of his teammates go through issues, one quite significant, better safe than sorry.
Thanks for the info. She had MRI when initial injury but not since. Most recent injury showed nothing on Xray. Maybe I should suggest if pain continues. Ugh I hate gymnastics (a love hate relationship )