AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

History of AFNI updates  

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May 29, 2018 10:40AM
Hi everybody,
I already run a seed-based correlation from animals resting state data.
I would like to extract the connected clusters with a threshold corrected for FDR

I have two fMRI data for each animal.
I already coregistrate and pretreated my fMRI data and performed a classical seed-based correlation.

Now, I want to use 3dttest++ on all my z-fisher transformed data (14 animals x2)
So I first try to use 3dttest++ with Clustsim :

'3dttest++', '-setA', subprocess.list2cmdline(listemap), '-Clustsim', '-prefix', 'clustersim-stat_fisher_' + atlas_name2 + '.nii.gz'

and then I try to use the output of this analysis in clusterize to extract them

The problems I found where :
- Could I use 3dttest++ with non-independent (2 fold the same animal) data
- Who could I use a threshold non-corrected pvalue at p<0.05 to found the good cluster-thresholding FDR corrected ?
- I do not know if clusterize already use the output 1D table from this analysis ? If not who could I use it ?
- The nii output contains 2 images ('SetA_mean, and SetA_Zscr), do I have to apply clusterize on the first, second or load both of them in afni ?

I also found that there is an ETAC option,

It is maybe better to use this one ?

So my other questions are:
- Which kind of mask is needed ? My data were already masked but it seems obligatory...
- Is there specific option that I need to use ? -ACF ?
- The default threshold is p<0.05 ?

Thanks for your time !

Dough
Subject Author Posted

3dttest++ on resting state data for clusters extraction

Doughboys May 29, 2018 10:40AM

Re: 3dttest++ on resting state data for clusters extraction

rick reynolds June 04, 2018 03:32PM

Re: 3dttest++ on resting state data for clusters extraction

umeshksingla June 05, 2018 05:01AM

Re: 3dttest++ on resting state data for clusters extraction

rick reynolds June 05, 2018 04:41PM

Re: 3dttest++ on resting state data for clusters extraction

Doughboys June 07, 2018 08:34AM