The version is 1.3.1, fitk2, non-linear fitting made easy. fitk2 help you with non-linear fitting of one-tissue compartment model to plasma and tissue time-activity curves (TACs) to estimate K1, k2 and Vb. Parameters: 1) Plasma file (corrected for labeled metabolites) 2) Blood file 3) Tissue TAC file (*.dft) 4) Fit end...