Figure 2. Suppression of physiologic glucose uptake in normal myocardium. FDG-PET/CT images of patient with suspected cardiac sarcoidosis. (A) This patient underwent initial PET/CT scan with 18 hours of fasting, without a dietary preparation, and showed diffusely increased metabolism in the whole myocardium. (B) During the same hospitalization, this patient underwent PET/CT scanning again after a low-carbohydrate high-fat diet and 18 hours of fasting. PET/CT image after appropriate preparation showed no abnormal uptake in the myocardium, as it was successfully suppressed by the dietary preparation. CT: computed tomography, FDG: fluorodeoxyglucose: PET: positron emission tomography.