Sorry for my bad explanation. When I do a normal cortical thickness study, I know the average thickness for a label, e.g. cortex, and the values at each vertex of each hemisphere are stored in $subject/surf/?l.thickness. I would like to know if it is possible to obtain the same cortical thickness measure from the lh-rh registered hemispheres of each subject.
Regards,
Gabriel
El 25/03/13, Douglas N Greve <gr...@nmr.mgh.harvard.edu> escribió:
On 03/25/2013 10:52 AM, Gabriel Gonzalez Escamilla wrote:
>Thanks a lot for your answer,
>
>I'm sending you attached the diff of the two mris_preproc.
Those differences are just added features and won't change your results.
>
>When I wrote CT, I was meaning cortical thickness, as normally this values are in surf/?h.thickness, But how do I know the Xhemi-registered thickness values of each subject for lh-rh, or area or any of those indices?
I'm not sure what you mean. When you run mris_preproc, you specify whether you want thickness, etc.
doug
>
>Regards,
>Gabriel
>
>
>El 25/03/13, *Douglas N Greve * <gr...@nmr.mgh.harvard.edu> escribió:
>>
>>On 03/22/2013 06:45 AM, Gabriel Gonzalez Escamilla wrote:
>>> Dear Doug,
>>>
>>> I've seen that you restore the files to download, for the Xhemi
>>> registration. While I'm checking for the statistical process, I've
>>> seen that the one I have is: Date: 2012/12/06 16:06:52, Revision:
>>> 1.59.2.4, and the one that is on your ftp server is Date: 2012/12/06
>>> 16:06:17, Revision: 1.66, So mine is a lower version but recent hour,
>>> and the actual is newer version but seems that was created before the
>>> one I have. My question is, Which one should I keep?
>>Can you send me a diff of the two files?
>>>
>>> If I change the mris_precproc version. Shall I re-run this step
>>> before statistical analyses, to create a new lh.lh-rh.thickness.sm00.mgh?
>>>
>>> On the other hand I have some doubts about the statistical procedure.
>>> It's supposed that if I apply the Xhemi registration, as result the
>>> left and right hemispheres are equals to each other on every subject, so:
>>>
>>> A) Where can I get the CT values after the Xhemi registration to
>>> FSaverage_sym for the left and right hemispheres?
>>what are CT values?
>>>
>>>
>>> B) Given that I have two groups, Patients and Control, with two levels
>>> each, i.e male-female (Gp1male Gp1female Gp2male Gp2female
>>> Gp1maleVar1 Gp1femaleVar1 Grp2maleVar1 Grp2femaleVar1), and that I can
>>> set the contrasts and fsgd files as with a normal CT analisis, but
>>> only on my lh.lh-rh.thickness.smXX.mgh, wich is suppose to contain the
>>> left-right differences across subjects, right?
>>>
>>> Wich would be the right interpretation? of:
>>The interpretation does not really change because it is a xhemi analysis
>>>
>>> 1) 5 .5 -.5 -.5 0 0 0 0
>>Is the L-R difference between Grp1 and Grp2 different than 0 (regressing
>>out Var1 and gender)
>>>
>>> 2) 5 -.5 .5 -.5 0 0 0 0
>>Is the L-R difference between Males and Females different than 0
>>(regressing out Var1 and Group)
>>>
>>> 3) 0 0 0 0 .5 .5 -.5 -.5
>>Does the slope of the L-R difference with Var1 differ between Grp1 and
>>Grp2(regressing out gender)
>>>
>>> 4) 0 0 0 0 5 -.5 .5 -.5
>>Does the slope of the L-R difference with Var1 differ between Male and
>>Female(regressing out group)
>>>
>>
>>>
>>>
>>>
>>> Many thanks in advanced.
>>> Gabriel.
>>
>>--
>>Douglas N. Greve, Ph.D.
>>MGH-NMR Center
>>gr...@nmr.mgh.harvard.edu
>>Phone Number: 617-724-2358
>>Fax: 617-726-7422
>>
>>Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
>>FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html
>>Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/
>>
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>
>--
>--------------------------
>PhD. student Gabriel González-Escamilla
>Laboratory of Functional Neuroscience
>Department of Physiology, Anatomy, and Cell Biology
>University Pablo de Olavide
>Ctra. de Utrera, Km.1
>41013 - Seville
>- Spain -
>
>Email: ggon...@upo.es
>http://www.upo.es/neuroaging/es/
--
Douglas N. Greve, Ph.D.
MGH-NMR Center
gr...@nmr.mgh.harvard.edu
Phone Number: 617-724-2358
Fax: 617-726-7422
Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html
Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/
--
--------------------------
PhD. student Gabriel González-Escamilla
Laboratory of Functional Neuroscience
Department of Physiology, Anatomy, and Cell Biology
University Pablo de Olavide
Ctra. de Utrera, Km.1
41013 - Seville
- Spain -
Email: ggon...@upo.es
http://www.upo.es/neuroaging/es/
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