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18F-fluorthanatrace population parent fraction curve. Fitting was performed on population mean values, using sigmoidal function. Fitted equation was used for parent fraction corrections for all kinetic modeling blood input curves and was of form [(1 − t3/(t3 + 10A)]B + C)/(1 + C), where A = 6.504, B = 0.053, and C = 1 × 10−8, with time after injection, t (in seconds).
