Hi - Do you mean you used the GUI? In which case, if you click on the nonlinear toggle, you should have the option of selecting both forward and inverse warps. This choice should be reflected in the probtrackx2 call that the GUI creates. Is this not the case for you?
The probtrackx2 GUI does not search the directories for .mat or warp files, you have to provide them explicitly.
Cheers
Saad
On 5 Feb 2013, at 22:56, Michael Harms wrote:
Hi Saad,
I used "Fdt" to generate an example 'probtrackx2' command involving a seed mask that was non-linearly registered to "Seed space".
I noticed that the ensuing command only uses ".mat" files, and no "warp.nii.gz" files.
What tells 'probtrackx2' that you have a non-linear registration? Is it the existence of the --invxfm argument itself?
And second, I'm guessing that 'probtrackx2' automatically searches the directory with the .mat files to locate the corresponding warp transforms?
thanks,
-MH
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Conte Center for the Neuroscience of Mental Disorders
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Saad Jbabdi
University of Oxford, FMRIB Centre
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