On 9 November 2012 15:56, Anastasia Yendiki <ayendiki@nmr.mgh.harvard.edu> wrote:

Hi Jon - The path.pd volumes are indeed the posterior probability distributions of each pathway. They are not normalized to a sum of 1 though b/c they're estimated by a sampling algorithm (drawing sample paths from this unknown distribution and adding up the sample paths, instead of estimating the distribution directly).

Hope this helps,
a.y

On Fri, 9 Nov 2012, Jon Clayden wrote:

Dear all,
I understand that the various "path.pd" image files that are created by TRACULA represent a posterior
distribution over the corresponding tract location, but I was wondering if someone could explain to me
exactly what the values in these images mean. I assume that they are not probabilities as such, since they
have values ranging up to several hundreds.

Thanks in advance,
Jon

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