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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September 28, 2021 12:39PM
3dUnifize is the program we use for intensity inhomogeneity correction; however, we typically use this on the anatomical datasets and not on the EPI data. You may use this on EPI data for an alignment target, but not for GLM analysis. The GLM analysis pipeline with afni_proc.py will typically include a scaling step, where each voxel is treated independently of the others. No grand mean scaling is performed only voxelwise scaling, so that's less of a concern in AFNI.
Subject Author Posted

Intensity inhomogeneity correction

Marina Fernandez Alvarez September 28, 2021 11:24AM

Re: Intensity inhomogeneity correction

Daniel Glen September 28, 2021 12:39PM

Re: Intensity inhomogeneity correction

Marina Fernandez Alvarez September 29, 2021 07:20AM

Re: Intensity inhomogeneity correction

Daniel Glen September 29, 2021 03:42PM

Re: Intensity inhomogeneity correction

Marina Fernandez Alvarez October 01, 2021 06:00AM