o much. Is that appropriate? In other words, can
we trust the motion parameters and exclude subjects on that basis?
Thank you for your time and consideration,
Sincerely,
Loïc Daumail
Graduate Intern at Athinoula A. Martinos Center for Biomedical Imaging MGH/HST
From: Daumail
Dear FreeSurfer experts,
I am currently using TRACULA( from freeSurfer 6.0), and on the freeview
visualization of merged files of the probability distributions of the tracts, I
don't understand the thing about the "20% threshold".
Indeed, on the tracula tutorial, it is written that the tracts
Dear FreeSurfer experts,
I am analyzing a dataset (Q-Ball) of subjects with TRACULA on FreeSurfer 6.0.
b1=0, b2=3000 s/mm2 and diff directions = 90.
Surprisingly the trac-all reconstruction with doeddy =1 was not as good as
with doeddy = 0 on average on all the subjects, as in our dataset
Dear FreeSurfer experts,
I would like to understand better the principle of eddy_correct:
-in which way the eddy currents caused by motion are set apart from the eddy
currents caused by fast switching diffusion-encoding gradients?
-and then, how are the affine registration matrices reflecting
tion/etc. parameters of the registration rather than the matrix
itself. You can run dmri_motion without arguments to see details.
Best,
a.y
From: freesurfer-boun...@nmr.mgh.harvard.edu
on behalf of Daumail, Loic Jean
Sent: Tuesday, June 12, 2018 5:33:17 PM
To: freesurfer
Hello,
I have several questions regarding the dwi.ecclog file data from Tracula, using
the FreeSurfer version V6.0.0.
1) Does Tracula still use eddy_correct from FSL, or was it updated with the new
eddy function from FSL?
2) Are the values for each slice of dwi.ecclog relative to the first
