Re: [Freesurfer] standard deviation map

2010-06-13 Thread Bruce Fischl
Hi Michael, sorry, a bunch of us have been away in Barcelona with very slow network access. Did this question get answered? I think Doug has something to do this (as do I somewhere, but I'm sure Duog's is better :>) cheers Bruce On Mon, 7 Jun 2010, Michael Scheel wrote: > Dear FS experts, >

[Freesurfer] standard deviation map

2010-06-07 Thread Michael Scheel
Dear FS experts, I have a anatomical scan of a subject with a rare neurogenetical disorder. I'd like to compare this with a age matched control group. How can I visualize a z-score transform map of the cortical thickness, i.e. how would I compute and vizualize the number/amount of standard devi

Re: [Freesurfer] Standard deviation map

2007-09-20 Thread Inês Souta
ok. That's good enough for me by now. Thanks a lot Inês 2007/9/20, Bruce Fischl <[EMAIL PROTECTED]>: > > if you draw a label outlining the region you can use > mris_anatomical_stats -l to get the thickness standard > deviations I think. Usually they aren't that interesting because the > thicknes

Re: [Freesurfer] Standard deviation map

2007-09-20 Thread Bruce Fischl
if you draw a label outlining the region you can use mris_anatomical_stats -l to get the thickness standard deviations I think. Usually they aren't that interesting because the thickness varies with geometry (e.g. sulci are thinner than gyri). cheers, Bruce On Thu, 20 Sep 2007, Inês Souta w

Re: [Freesurfer] Standard deviation map

2007-09-20 Thread Inês Souta
Well, I'm dealing with a patient with an heterogeneous lesion. Somehow, the lesion area seems to have misled the algorithm in terms of white and pial surface definition, leading to an erroneous cortical thickness measure in that area. What I was interested in analising (if possible) is the dispersi

Re: [Freesurfer] Standard deviation map

2007-09-20 Thread Bruce Fischl
what exactly do you mean? Spatial standard deviations? Usually those aren't terribly interesting, and it's the cross subject ones that are more useful, but that doesn't sound like what you mean. Bruce On Thu, 20 Sep 2007, Inês Souta wrote: Hi there, How can I get a standard deviation map o

[Freesurfer] Standard deviation map

2007-09-20 Thread Inês Souta
Hi there, How can I get a standard deviation map of the thickness measurements ina subject? Inês ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

Re: [Freesurfer] Standard deviation map

2007-08-28 Thread Doug Greve
How did you compute the average? If using mri_glmfit, it will store an rstd.mgh file with the stddev, you can load it like any other overlay. doug Inês Souta wrote: Hello, After computing the average thickness of an average subject (prior to Qdec), how can I estimate and get a map of standa

[Freesurfer] Standard deviation map

2007-08-28 Thread Inês Souta
Hello, After computing the average thickness of an average subject (prior to Qdec), how can I estimate and get a map of standard deviations of the thickness measures across the subjects I've averaged. Thanks, Ines ___ Freesurfer mailing list Freesurfer