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Osteomyelitis is usually evident on the bone scan early, 1 week to 10 days before x-ray changes become evident on film. Modification to the routine bone scan to a three phase bone scan in addition to the routine delayed (2-3 hour) static images also includes a radionuclide angiogram and blood pool images. Multiple delayed images (up to 24 hours post injection) aid in the ability to distinguish between cellulitis and osteomyelitis.   Early images identify uptake of tracer independent of hyperemia.   Osteomyelitis demonstrates increasing lesion to background activity with time, whereas cellulitis shows the opposite.

                           

                                


         

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Copyright 2001 University of Pennsylvania School of Veterinary Medicine
Faculty Sponsor: Dr. Michael W. Ross
Technologist: Vivian S. Stacy CNMT
Comments and suggestions to vstacy@vet.upenn.edu