Fig. 2.

Combined 18F-FDG PET/MRI images in a 72-year-old male with cardiac and extra-cardiac sarcoidosis. Basal short-axis native T1 map (A), native T2 map (B), late gadolinium-enhanced (LGE) image (C), and fused 18F-FDG PET and LGE image (D) demonstrate slightly elevated native T1 (green arrow) and corresponding mid-wall LGE (red arrow) at the basal inferolateral wall. There was no corresponding elevation of native T2 or focal FDG uptake (white arrow). There was extra-cardiac FDG uptake in mediastinal and hilar lymph nodes (not shown) and in the lung parenchyma (blue arrow) in keeping with extra-cardiac sarcoidosis. With respect to the heart, the study was negative on PET and positive on MRI, likely reflecting chronic, burnt-out cardiac sarcoidosis