Fig. 2From: Use of population input functions for reduced scan duration whole-body Patlak 18F-FDG PET imagingThe effect of positive (a), negative (b), positive reversed (c), and negative reversed (d) gradual input function modification over 60 min of 5, 10, 15, 20, and 25% on the percentage difference in Ki. The empty markers represent the effect of the modification on Ki. The filled markers show the remainder of this bias after rescaling of the PIFBack to article page