The threshold must be in the form of -log10(pthreshold). So, if you want pthreshold=.05, then use 1.3 doug
On 01/31/2013 07:37 AM, Richter, Julia wrote:
Dear Doug,
thanks for your reply. I tried the command you suggested, but I always get an error message that there is something wrong with my threshold. I took a screenshot of the command window and attached it to this mail. I will be very happy if you have a look at it.
Looking forward to your answer,
Best, Julia
-----Ursprüngliche Nachricht----- Von: freesurfer-bounces@nmr.mgh.harvard.edu [mailto:freesurfer-bounces@nmr.mgh.harvard.edu] Im Auftrag von Douglas Greve Gesendet: Mittwoch, 30. Januar 2013 17:16 An: Richter, Julia; free surfer Betreff: Re: [Freesurfer] mean cortical thickness of significant clusters in qdec
Oh, sorry, I thought you said you were using mri_glmfit-sim (which does not have an FDR option). Are you using the FDR in QDEC? If so, it will display the voxel-wise threshold that realizes the FDR threshold. You can then run mri_glmfit-sim --cache threshold sign --cwpvalthresh .99 where threshold is the voxelwise threshold from FDR and sign is either abs (absolute), pos, or neg. Setting cwpvalthresh=.99 tell it to report all clusters
doug
On 1/30/13 8:09 AM, Richter, Julia wrote:
No it is not...or I just do not find it.
Might it be that I only get the xxx.y.ocn.dat if I correct for multiple comparisons with Monte Carlo? If yes, is there any possibility that I get this xxx.y.ocn.dat when correcting with FDR?
Many thanks, Julia
-----Ursprüngliche Nachricht----- Von: freesurfer-bounces@nmr.mgh.harvard.edu [mailto:freesurfer-bounces@nmr.mgh.harvard.edu] Im Auftrag von Douglas N Greve Gesendet: Dienstag, 29. Januar 2013 18:46 An: freesurfer@nmr.mgh.harvard.edu Betreff: Re: [Freesurfer] mean cortical thickness of significant clusters in qdec
Hi Julia, it should just be created when mri_glmfit-sim runs. Is it not? doug
On 01/29/2013 11:03 AM, Richter, Julia wrote:
Dear FreeSurfer experts,
I did a group analysis in qdec, found several significant clusters and would now like to extract the mean cortical thickness of each significant cluster. I know that I have to run mri_glmfit-sim to do this, but I do not understand which commands I need to get the xxx.y.ocn.dat as output by running mri_glmfit-sim.
Any ideas? Any help is appreciated. J
Best wishes, Julia
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
-- Douglas N. Greve, Ph.D. MGH-NMR Center greve@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/
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer