The diagnosis of reflex sympathetic dystrophy (RSD) relies on clinical
evaluation, scintigraphy or MR imaging, and routine radiographs. Beca
use RSD has variable manifestations with a strong psychogenic overlap,
it is desirable to have a noninvasive test to determine the presence
of RSD to allow for appropriate treatment. MR imaging allows a differe
ntial diagnosis between RSD and other bone lesions. It proves to be a
reliable technique in showing and characterizing RSD better than radio
graphic examination and radionuclide study.