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Radiology, Vol 196, 647-655, Copyright © 1995 by Radiological Society of North America

ARTICLES

Quantification of inflammation in the wrist with gadolinium-enhanced MR imaging and PET with 2-[F-18]-fluoro-2-deoxy-D-glucose

WE Palmer, DI Rosenthal, OI Schoenberg, AJ Fischman, LS Simon, RH Rubin and RP Polisson
Department of Radiology, Massachusetts General Hospital, Boston 02114, USA.

PURPOSE: To quantify the activity of joint inflammation with magnetic resonance (MR) imaging and positron emission tomography (PET). MATERIALS AND METHODS: Gadolinium-enhanced MR imaging and 2-[fluorine- 18]fluoro-2-deoxy-D-glucose (FDG) PET of the wrist were performed prospectively in 12 patients receiving antiinflammatory therapy. Patients were studied three times: off medications for 2 weeks, after 2 weeks of treatment with prednisone or nonsteroid antiinflammatory drugs, and after 12 weeks of treatment with methotrexate. Volume of enhancing pannus (VEP) was determined from fat-suppressed MR images (12 patients). FDG uptake was calculated from PET images (11 patients). RESULTS: VEP and FDG uptake were closely correlated (r > .86, P < .0001), as were changes in VEP and standardized uptake volume (r > .91, P < .0002). VEP and FDG uptake were strongly associated with clinical findings in wrists (P < .002) but not with treatment outcomes (P > .05). CONCLUSION: Contrast material-enhanced MR imaging and PET allow quantification of volumetric and metabolic changes in joint inflammation and comparison of efficacies of antiinflammatory drugs.


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