Journal
JOURNAL OF NUCLEAR CARDIOLOGY
Volume 25, Issue 3, Pages 785-794Publisher
SPRINGER
DOI: 10.1007/s12350-016-0616-y
Keywords
Fluorodeoxyglucose (FDG); PET imaging; cardiovascular magnetic; resonance imaging; PET/MR imaging; myocarditis
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Besides cardiac sarcoidosis, FDG-PET is rarely used in the diagnosis of myocardial inflammation, while cardiac MRI (CMR) is the actual imaging reference for the workup of myocarditis. Using integrated PET/MRI in patients with suspected myocarditis, we prospectively compared FDG-PET to CMR and the feasibility of integrated FDG-PET/MRI in myocarditis. A total of 65 consecutive patients with suspected myocarditis were prospectively assessed using integrated cardiac FDG-PET/MRI. Studies comprised T2-weighted imaging, late gadolinium enhancement (LGE), and simultaneous PET acquisition. Physiological glucose uptake in the myocardium was suppressed using dietary preparation. FDG-PET/MRI was successful in 55 of 65 enrolled patients: two patients were excluded due to claustrophobia and eight patients due to failed inhibition of myocardial glucose uptake. Compared with CMR (LGE and/or T2), sensitivity and specificity of PET was 74% and 97%. Overall spatial agreement between PET and CMR was kappa = 0.73. Spatial agreement between PET and T2 (kappa = 0.75) was higher than agreement between PET and LGE (kappa = 0.64) as well as between LGE and T2 (kappa = 0.56). In patients with suspected myocarditis, FDG-PET is in good agreement with CMR findings.
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