What pathway are you trying to track? You certainly cannot track all
pathways with 6 directions accurately that you would be able to track with
>25 directions.
Peace,
Matt.
-----Original Message-----
From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf
Of Daniel Simmonds
Sent: Friday, January 14, 2011 2:36 PM
To: [log in to unmask]
Subject: [FSL] tractography with low (<25) directions
Hello,
I am currently working with a dataset that has 6 directions (+B0) and am
interested in tractography. I have run some of the subjects through bedpostx
and probtrackx. The analysis ran with no problems, and the results were
reasonable looking and quite robust. I have searched for some explanation
for this recommendation, and have found very little. Can anyone give me a
rundown of the rationale for this recommendation, and whether/why my results
would be invalid/unreliable (and does this depend on whether the data is
primarily being used for individual analyses or group analyses)? Thank you.
Dani
|