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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June 24, 2013 05:41PM
I'll agree with Peter that your problems are likely caused by the fourier interpolation that often gives ringing artifacts. Switch to -cubic instead and see if that works. There's a fair amount of ghost artifacts in your data that we don't typically see. Still, I don't think a rigid body correction scheme will work as well as an affine one. See this previous posting on using align_epi_anat.py to do this with 3dAllineate and affine transformations.

http://afni.nimh.nih.gov/afni/community/board/read.php?1,68951,82860#msg-82860

Even better, try the Tortoise package to handle all this for you.
Subject Author Posted

Intensity anomalies after 3dvolreg

Anonymous User June 20, 2013 11:32AM

Re: Intensity anomalies after 3dvolreg

Peter Molfese June 20, 2013 02:33PM

Re: Intensity anomalies after 3dvolreg

Anonymous User June 20, 2013 04:49PM

Re: Intensity anomalies after 3dvolreg

Anonymous User June 24, 2013 02:44PM

Re: Intensity anomalies after 3dvolreg

Peter Molfese June 24, 2013 03:22PM

Re: Intensity anomalies after 3dvolreg

Daniel Glen June 24, 2013 05:41PM