Recent advances in hybrid Positron Emission Tomography (PET) Magnetic Resonance (MR) technology have enabled simultaneous imaging with both modalities. Sarcoidosis is a granulomatous disease that, when involving the heart has a poor prognosis. However, cardiac sarcoidosis has been shown to respond to immunosuppressive therapy. Currently, both late gadolinium enhancement (LGE)-MR and 18F-fluorodeoxyglucose (18F-FDG)-PET are used separately to evaluate the disease yet a clear diagnosis is not easily achieved. In this work, we investigate the potential improvement in evaluation with combined 18F-FDG-PET/MR imaging.