Thanks.I have obtained:
$Id: mri_segstats.c,v 1.75.2.9 2013/02/16 00:09:33 greve Exp $
cwd
cmdline mri_segstats --seg z.nii.gz --annot Control21_FS rh aparc --i z.nii.gz
--sum summaryfile
sysname Darwin
hostname iMac-di-Stefano.local
machine x86_64
user Stefano
UseRobust 0
Loading z.nii.gz
Loading z.nii.gz
Voxel Volume is 1 mm^3
Generating list of segmentation ids
Found 22 segmentations
Computing statistics for each segmentation
0 -7 2 2.000
1 -6 110 110.000
2 -5 255 255.000
3 -4 518 518.000
4 -3 1190 1190.000
5 -2 1692 1692.000
6 -1 4104 4104.000
7 0 61577 61577.000
8 1 42598 42598.000
9 2 28146 28146.000
10 3 14859 14859.000
11 4 5845 5845.000
12 5 1899 1899.000
13 6 485 485.000
14 7 116 116.000
15 8 75 75.000
16 9 74 74.000
17 10 78 78.000
18 11 65 65.000
19 12 104 104.000
20 13 45 45.000
21 14 5 5.000
How I can know the meaning of this number? Where is z? I have tried also
with:mri_segstats --seg z.nii.gz --annot Control_21 rh aparc --i z.nii.gz --sum
summaryfile --mask
.../fc.ramgseed.surf.rh/R_Amygdala/my-glm.wls/group.diff/cache.th13.neg.sig.masked.nii.gz
--avgwfvol mrivol
but I have problem with interpretation.
Stefano
----Messaggio originale----
Da: gr...@nmr.mgh.harvard.edu
Data: 30-ott-2015 16.17
A: <freesurfer@nmr.mgh.harvard.edu>
Ogg: Re: [Freesurfer] average z-score of each subject from a common cluster
On 10/30/15 7:16 AM, std...@virgilio.it
wrote:
Hi list,
I have two queries, please.
I'd like to have the z-score from my rsfMRI data
(seed-analyis).
1) I have extract the z-score from the Vtx Max
In details, after groups comparison analysis, I have opened
the cache.th13.pos.sig.cluster.summary contained in group.diff
folder and I have read the Vtx Max coordinates.
Next, I have open the z.nii.gz of each subject and I have
expected the z-score from the vertex which have the Vtx Max
coordinates.
Is this procedure corrected?
Yes
2) z-score of each subject from a common cluster
I would like to use the cluster which shows the group
difference (cache.th13.pos.sig.cluster.nii.gz) as ROI mask.
Thus, I would extract from it the average of the z-score which
is contained in each subject.
How should I do?
Use mri_segstats passing the z map as the input (--i) and the
cluster map as the seg. The output will be --sum. Run with --help
for more info
Thanks.
Stefano
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