Hi Robert,
It is correct, although a better way to express it would be: "The
probability that the dominant path through the seed voxel will also
pass through (x,y,z)" is equal to 0.03.
Cheers,
Saad.
On 24 Apr 2009, at 16:19, Robert Terwilliger wrote:
> Dear FSL,
>
> I am just getting started with probtrackx and am trying to interpret
> the results in terms of probability.
>
> As an example, consider that I run probtrackx with a single seed
> voxel (in diffusion space), using all the default settings from the
> GUI.
>
> If I run fslstats -R on the output image, I find the range to be 0
> to 5000, which makes sense, considering that there were 5000 samples.
>
> So my question is in the interpretation of the results. Let's say I
> find a value of 150 at voxel (x,y,z). My thought is that I interpret
> this value as follows:
>
> The probability of connection between the seed voxel and (x,y,z) is
> 150/5000 = 0.03. Is this correct?
>
> Many thanks,
>
> Robert Terwilliger
Saad Jbabdi
Oxford University FMRIB Centre
JR Hospital, Headington, OX3 9DU, UK
+44 (0) 1865 222545 (fax 717)
www.fmrib.ox.ac.uk/~saad
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