Many thanks for your e-mail, Bruce. Would you mind just giving me a bit
more detail about this, or let me know where I can find this information?
As I understand, the registration between individuals in Freesurfer
doesn't depend on the talairach registration. Is that right?
And how do individual t
This worked perfectly well, thanks a lot for your quick answer!
I would appreciate to get some input for the following issue.
I run the mris_divide_parcellation on the fsaverage brain getting about
1000 parcellations:
mris_divide_parcellation fsaverage_fineparc rh aparc.a2005s_150.annot 150
rh_
the final tal coords are the average of the corresponding surface regions,
where the correspondence is established using spherical registration. Does
that make sense?
On
Wed, 21 Jan 2009, Lucia Garrido wrote:
Many thanks for your e-mail, Bruce. Would you mind just giving me a bit
more detail
Hi Diana,
I wonder whether dividing the parcellations is really what you want. It
would be pretty easy to put together a parcellation that is uniform in
spherical coordinates across subjects, so you get essentially a uniform
triangular tiling of each subject's brain. Would that be more useful
Dear FS experts
We divided the parcellations aparc.a2005s into about 1000 smaller
parcellations and would like to compare the cortical thickness of these
parcellations across subjects.
Due to the fact that the parcellations aparc.a2005s are in the native space
of each subject I am wondering wheth
I don't think you have to register them since they started in register. One
problem will be that if you are dividing based on area you may get a given
ROI divided into a different # of components in different subjects.
On
Wed, 21 Jan 2009, Jürgen Hänggi wrote:
Dear FS experts
We divided th
Hello -
I am a new graduate student working with Dr. Russ Poldrack at UCLA and
I am trying to
learn how to use Freesurfer. I downloaded all of the sample data from the page
FSTutorial/Data, but many of the tutorials seem to refer to data that
is not included in
the sample data.
The first t
Hi Jennifer
When did you download the data? We overhauled the tutorials and I
believe Nick updated the wiki with the new data couple of days back.
Please download the new one and try.
Krish
On Jan 21, 2009, at 3:56 PM, jbr...@ucla.edu wrote:
Hello -
I am a new graduate student working w
Hi all,
I have an MPRAGE which consistently fails the Talairach quality check (see
attached error) in autorecon1. (A 32-channel coil was used in this scan,
and I suspect that might be a cause of the failure.) Per the wiki's
suggestion, I have tried to manually fix the transform in tkregister2 an
Hi group,
I have some questions about the interpretation of my
results based on the contrasts that i have used in my analysis.
It is, i am sure a very basic question, and i would like to check
if my interpretation of the results is correct/valid.
I have 2 groups, and 1 variable, and
Jeff,
You can skip the talairach quality check by adding the flag -notal-check
to recon-all. In versions prior to v4.1.0, the threshold for the check
was too conservative, and the z-score threshold has been reduced from -4
to -6 in v4.1.0. I see your score is -4, so that is a valid transform
(on
Jennifer,
The tutorials matching the newly available data are found here:
http://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial
You will need to get v4.2.0, which will be released in a couple days
(actually, you can do the tutorial with what you have, but will bump
into a couple unrecognized flags
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