Re: [Freesurfer] Maps showing correlations between structural measures

2017-05-16 Thread Douglas Greve
You can do FDR or you can co cluster correction, but you can't do both. It looks like that paper only did FDR. If you want to do FDR, you can use mri_fdr. Run with --help for more info On 5/15/17 12:33 PM, Martin Juneja wrote: Thanks Dr. Greve. Regarding 2nd question, I am not sure how autho

Re: [Freesurfer] Maps showing correlations between structural measures

2017-05-15 Thread Martin Juneja
Thanks Dr. Greve. Regarding 2nd question, I am not sure how authors in this paper: http://www.sciencedirect.com/science/article/pii/S0166432815001837 performed FRD correction? If we do not run FDR, then is sig.mgh output already FDR corrected as shown in this paper? Thanks for your valuable time.

Re: [Freesurfer] Maps showing correlations between structural measures

2017-05-15 Thread Douglas N Greve
I think your command lines are correct. I would not expect that swapping the y and pvr to give the same results. sig=-log10(p)=30 is not totally unreasonable. I don't understand #2. Why are you running FDR and cluster correction? On 05/11/2017 06:39 PM, Martin Juneja wrote: > In addition to th

Re: [Freesurfer] Maps showing correlations between structural measures

2017-05-11 Thread Martin Juneja
In addition to that: I am always getting positive correlations (when I load sig.mgh) every time i.e. even when I correlated thickness and gyrification. None of the voxels/areas showing negative correlation between any of the structural measures On Thu, May 11, 2017 at 11:26 AM, Martin Juneja wrot

Re: [Freesurfer] Maps showing correlations between structural measures

2017-05-11 Thread Douglas N Greve
mri_glmfit will not generate a pcc file with --pvr. I think I just did not get around to adding support for this. What about the sig does not look right? You can often get funny looking maps because each voxel is a different design matrix. On 05/09/2017 03:15 PM, Martin Juneja wrote: > Dear Dr

Re: [Freesurfer] Maps showing correlations between structural measures

2017-05-09 Thread Martin Juneja
Dear Dr. Greve, I created two stacks: one with volume and the other with LGI using mris commands as following: mris_preproc --fsgd CV_LGI.fsgd --target fsaverage --hemi lh --meas volume --out Corr_CV_LGI/lh.vol.mgh mris_preproc --fsgd CV_LGI.fsgd --target fsaverage --hemi lh --meas pial_lgi --out

Re: [Freesurfer] Maps showing correlations between structural measures

2017-04-28 Thread Douglas N Greve
To use the PVR, you need to create a stack of the measures that you want to use (eg, lGI). This will be the same size as the stack you want to correlate with. Eg, if you use mris_preproc to create a thickness stack, you would use the same command to create the lGI stack. Create your FSGD file a

Re: [Freesurfer] Maps showing correlations between structural measures

2017-04-27 Thread Martin Juneja
Hi Dr. Greve, I did not find --help option very helpful here and also I could not find much help from the previous FreeSurfer posts. Could you please share more details here e.g. how to set up fsgd and contrast file and how to run mri_glmfit command here (e.g. what inputs should be provided here?)

Re: [Freesurfer] Maps showing correlations between structural measures

2017-04-27 Thread Douglas N Greve
You have to use the --pvr option to mri_glmfit. Run it with --help to get more info and write back if you still have questions On 04/26/2017 08:33 PM, Martin Juneja wrote: > Hello FreeSurfer experts, > > I came across a paper: > http://www.sciencedirect.com/science/article/pii/S0166432815001837

[Freesurfer] Maps showing correlations between structural measures

2017-04-26 Thread Martin Juneja
Hello FreeSurfer experts, I came across a paper: http://www.sciencedirect.com/science/article/pii/S0166432815001837 where correlation maps between volume and gyrification are reported. I am familiar with GLM in FreeSurfer i.e. correlating behavioral measures with volume and gyrification but I was