Figure 4.

A. DVR values of the putamen of the representative non-human primate obtained by the image-derived Logan DVR approach, as starting number of flame was changed from the beginning to the last -1 one by one. The maximum of DVR was obtained at 21 flame, the flame of which was determined for the optimal starting flame. B. Percent errors of DVR were shown when starting number of flame was changed from the beginning to the last -1. When the starting flame was deviated ± 3 from the optimal flame, the percent error was within 1%, showing the reliability of the present approach.