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Dear Mr. Greve,
does gamma.table.dat contain the corrected residuals then? or z-scored values?
Best, Melissa
________________________________ Von: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu im Auftrag von freesurfer-request@nmr.mgh.harvard.edu freesurfer-request@nmr.mgh.harvard.edu Gesendet: Samstag, 10. Juli 2021 18:00:02 An: freesurfer@nmr.mgh.harvard.edu Betreff: Freesurfer Digest, Vol 209, Issue 11
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Today's Topics:
1. Re: Cortical thicknees normalization values (Douglas N. Greve) 2. Re: Calculating group-wise Dice Similarity Coefficient and corresponding surface map (Douglas N. Greve) 3. Re: smoothing volume data extracted using aparcstats2table (Douglas N. Greve) 4. Hippocampal Subfield Definition Errors (Franchesca Kuhney) 5. Re: Problem with mri_glmfit-sim (Douglas N. Greve) 6. Re: recon-all soft errors (Douglas N. Greve) 7. Re: mri_glmfit DOSS (Douglas N. Greve) 8. Re: LGI FS 7.1 (Douglas N. Greve) 9. Re: Can I extract GLM values? (Douglas N. Greve) 10. Re: fcseed-config (Douglas N. Greve) 11. Re: Help segmenting all subjects in a folder (Douglas N. Greve) 12. Re: Question about Extracting QDEC Results (Douglas N. Greve) 13. Re: Edit pial surface (Douglas N. Greve) 14. Re: Hippocampal Subfield Definition Errors (Iglesias Gonzalez, Juan E.) 15. Re: What is the relationship between qdec results and aparc.stats? (Douglas N. Greve) 16. Re: setwdelay error 1 weight (Douglas N. Greve) 17. Re: Transformation Applied to T1.mgz during recon-all (Douglas N. Greve) 18. Re: Visualizing specific cortical parcels in Desikan Killiany atlas (Douglas N. Greve) 19. Re: Freesurfer longitudinal stream error (Douglas N. Greve) 20. Re: LGI FS 7.1 (Del Re, Elisabetta) 21. Re: question about longitudinal data analyses (Douglas N. Greve) 22. Average intensity from functional image within a label along the surface (Erik Jahner)
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Message: 1 Date: Fri, 9 Jul 2021 12:40:13 -0400 From: "Douglas N. Greve" dgreve@mgh.harvard.edu Subject: Re: [Freesurfer] Cortical thicknees normalization values To: freesurfer@nmr.mgh.harvard.edu Message-ID: f3f7c9b2-9e2d-80c3-4d5e-c4c92359d4e1@mgh.harvard.edu Content-Type: text/plain; charset="windows-1252"
We generally do not normalize it by anything. ICV norm is not needed because thickness does not scale with head size. Sometimes people will normalize by mean thickness, but that changes the question being answered, so that is more a question for you
On 6/24/2021 3:01 PM, Gabbo Ram?rez Garc?a wrote:
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????????External Email - Use Caution
Hi freesurfer user.
I have been working with some cortical thickness values of a control group to test some changes related to cognitive training. However, I have been hesitating about whether I have to normalize the cortical thickness values (as happens with subcortical volumes and ICV) or not. I have read a little about it and I understood that I could use the ICV or/and mean cortical thickness, but I didn't find a specific criteria to do or not this normalization. Any clue, recommendation, explanation or paper about this will be very helpful.
Thanks in advance.
*or reposting?discussion?of this question.
*Gabriel R.*
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