Figure 4
Effects of PET noise on CV of k 3 . The results in 40-min 3P++ (open triangle), 40-min 3P + (open square), and 90-min 4P (open circle) analyses are shown. Five different PET noises (0.025 to 0.3) were added to the [11C]PIB baseline TACs of the target ROI of the NC subjects. CV of k 3 was calculated from 100 k 3 estimates as CV (%) = (SD/mean) × 100.