Hi Robert,
If you include M1 as a seed mask and Ped. as a "classification target" (--targetmasks in the command line), then you will get an output called seeds_to_<blah>
where <blah> is the name of your Ped. mask. This file will answer question (A): what M1 voxel has what likelihood of connection to Ped.
The fdt_paths, masked by Ped., will answer question (B): what Ped. voxel has what likelihood of getting a connection from M1 as a whole.
Saad.
On 8 Oct 2010, at 08:23, Robert Schulz wrote:
> Hi FSLers,
>
> I would like to determine the connectivity between M1 and ped. cerebri. Therefore I tested
>
> - 1) M1 seeding mask (800 seed voxels, 5000 samples) and the peduncle cer. as the target mask (1000 voxels)
> - 2) multiple masks approach with the same masks, each 5000 samples.
>
> What approach (or another) would be best to answer the follwing questions:
>
> A) What voxel in M1 (1-800) has what probability to reach the peduncle? How can I calculate this?
> B) What voxel in Ped. (1-x) has what probability to be targeted by M1? How to calculate?
>
> And finally it is not 100% clear to my what the numbers in fdt-path for both approach 1) and 2) mean? Particularly in regard of VCP and both questions A and B. Could someone explain it to my?
>
> Again, thank you so much for your support! I really appreciate that.
>
> Kind regards to you
>
> Robert
>
> =======================
> University Medical Center Hamburg Eppendorf
> Neurology Dept.
>
--
Saad Jbabdi
University of Oxford, FMRIB Centre
JR Hospital, Headington, OX3 9DU, UK
(+44)1865-222466 (fax 717)
www.fmrib.ox.ac.uk/~saad
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