Hi - waypoint masks do not stop your trajectories. You can use exclusion masks for this. Cheers Tim On 19 Mar 2007, at 09:18, D. Kim wrote: > Hello > > I`ve got some questions about fiber tracking using FDT. > I wanna find the probable tracts from cortex to sub-cortex because the > result from sub-cortex to cortex seems problematic. > > Now I'm trying to use FDT by waypoint masks option. However the > resultant > tracts do NOT stop at the target mask BUT pass through it. > How do I find the way just to target mask? > Please let me know it. > Thanks > > D. Kim.