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Hi Stam, I'm afraid this is not possible using probtrackx. You will have to run it N times.. Cheers, Saad. On 25 Aug 2008, at 19:31, Stamatis Sotiropoulos wrote: > Hi FSL users, > I am using probtrackx and I am trying to track from N different > seed voxels > and keep the connectivities obtained from each individual seed > voxel. I do not > want to use single seed mask mode, since that will sum the > connectivities > obtained from the individual seeds. So an option would be to run > probtrackx N > times in single seed mode, specifying each time the coordinates. Is > there > instead a way to pass the coordinates of the N voxels as an ascii > input file > and run probtrackx just once? > > Thank you, > Stam > --------------------------------------------------------------------------- Saad Jbabdi, Postdoctoral Research Assistant, Oxford University FMRIB Centre FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK +44 (0) 1865 222545 (fax 222717) [log in to unmask] http://www.fmrib.ox.ac.uk/~saad ---------------------------------------------------------------------------