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

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Daniel Glen
September 17, 2021 03:35PM
"Best" is a word we tend to avoid, but "good", "reasonable" and "better" are okay. The Euclidean norm (enorm) is usually the one that we use. That's the L2 norm of the backward difference of the motion parameters. The motion parameters are relative to a base volume, not relative to the previous one. afni_proc.py's help has more information under the help for the option "-regress_censor_motion LIMIT" which uses the enorm. You can also see 1d_tool.py help examples 10b, 15a for examples of generating censor lists with enorm or pairwise displacement.
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Reporting motion

Dxc536 September 09, 2021 02:20PM

Re: Reporting motion

Daniel Glen September 17, 2021 03:35PM