Dear Bruce and Doug,

Would you please shine some light on what the freesurfer files mean?

For example, rh.orig, once mris_converted, starts with

115750 231496

21.097221 -65.951393 -18.834326 0

20.621031 -66.165680 -18.995041 0

.....

I thought that this file gives all unidentified regions, since 0=unknown, but it doesn't make sense.

Furthermore,

1) What do the first two numbers mean?

2) Not all files can be fed into mris_convert. Do you recommend using read_surf.m instead?

Thank you very much!

Sincerely,

On Tue, Mar 4, 2014 at 7:30 AM, Bruce Fischl <fischl@nmr.mgh.harvard.edu> wrote:

Hi Ye

it is both that, and volumes of label indices (e.g. 17=Left Hippocampus) and surface models (triangles, edges, points) and scalar and vector fields over them.

cheers
Bruce

On Mon, 3 Mar 2014, ye tian wrote:

Dear Bruce and Doug,
Thank you very much!

Would you please tell me more about what "freesurfer data" actually is? Is
it composed of pixel positions and intensities? If that's the case, how do
you calculate cortical thickness?

Thank you very much!

Sincerely,
Ye

On Fri, Feb 28, 2014 at 10:21 AM, Douglas N Greve
<greve@nmr.mgh.harvard.edu> wrote:

Can you be more specific about what you mean by "freesurfer
data"? Each
subject has 300MB of "data"
doug

On 02/27/2014 10:48 PM, ye tian wrote:
> Dear Freesurfers,
>
> I would like to do some customized model fitting for cortical
> thickness. Is there a way to export freesurfer data into R or
simply
> as a text?
>
> Thank you very much!
>
> Sincerely,
> Ye
>
>
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