AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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sondosayyash
August 15, 2018 04:53PM
Hi everyone,

I was hoping I can get some clarification on two things.

First is: I was taking a look at the output "PAIRMAP" after running 3dtrackID -mode prob
and I noticed that the tracts are not necessarily continuous and connected between a pair of ROI's.
I've attached an image of what I mean. Is this normal? I thought the way probabilistic tractography works is that it only include a single path (the more likely path) and does not include any paths that may deviate away from that and end at a random spot.

Second: Also, can I get the connectivity values between pairs of ROIs (from probabilistic tractography)? Which file is that? I tried to open the file ending in "PAIRMAP.niml.lt" but that doesn't seem to be the correct file. I'm only asking so I can perform statistical analysis on it.

Any help would be appreciated.
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Subject Author Posted

FATCAT: Probabilistic tractography acting up? Attachments

sondosayyash August 15, 2018 04:53PM

Re: FATCAT: Probabilistic tractography acting up?

ptaylor August 15, 2018 05:19PM