Figure 1.
Population derived VIFs using Gd-DTPA (N = 11) (a) and P846 (N = 9) (b). P846 had a longer wash-out period than Gd-DTPA due to its larger size. Both Gd-DTPA and P846 have a relatively small standard deviation at the peak (13% and 15%, respectively). However, both have a larger standard deviation at ~5–10 minutes during wash-out equal to 32% and 25%, respectively. Panel (c) illustrates two example VIFind (blue dashed and red solid lines) obtained using Gd-DTPA compared to the VIFpop (solid black line).