Osteomyelitis (infection in the bone) can cause pain and fevers and lethargy.
MRI's give more detail about soft tissue problems (as distinct from bone problems).
If you FReepmail me with more information about your injury and symptoms and what's been done, I could do a Medscape search for information on what might be going on, what might help...just to give you some ideas about what to ask your doctor about...
I always wanted one of those little handheld medscan diagnostic computers that Dr. McCoy had on StarTrek. "Weedle..weedle...weedle" and you have an answer....
LOL. I could not be trusted with one of those. It would make me into an instant hypochondriac...and I would drive my children and husband nuts.
Not to mention the pets.
You've got mail.