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Vertical long axis view images comparing 13N-ammonia perfusion scan (top) with 18F-fluorodeoxyglucose scan (bottom) beside fused transaxial images of 18F-fluorodeoxyglucose scan. Perfusion-metabolism mismatch is visible in the basal anterior and basal antero-lateral walls in A and C. (B and D) No active sarcoidosis is shown (Patient 1).
