Glucose metabolic rate from four-dimensional [ 18 F]FDG PET/CT to differentiate sarcoid lesions from malignant lesions.

Active sarcoid lesions are sometimes associated with FDG accumulation and should be differentiated from malignant lesions. SUV and metabolic rate of glucose (MRglc) strongly positively correlated, and MRglc could differentiate sarcoid and malignant lesions. MRglc allows for accurate evaluation and staging of malignant lesions.