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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ptaylor
January 23, 2023 04:29PM
Hi, Matt-

Glad the article was of interest!

I think the main thing happening is noting the distinct usage of 2 AFNI programs for adjusting header information and datasets:
+ 3dresample is useful when the current header information is *correct* (in the sense that the data on disk is consistent with the header info), and when you change a header property like orientation, the data also gets changed to stay correct.
+ 3drefit is useful when the current header information is *incorrect*, and you want to change a header property like orientation, and the data will *not* be changed simultaneously.
As a corollary, if your data *starts* correct and you change the header property of orientation with 3drefit, then it will *change* to be incorrect.

If I understand correctly, that is what has happened in your case?

--pt
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Subject Author Posted

-check_flip

Matthew Hoptman January 23, 2023 02:08PM

Re: -check_flip

ptaylor January 23, 2023 04:29PM

Re: -check_flip

Matthew Hoptman January 23, 2023 05:04PM

Re: -check_flip

Matthew Hoptman January 23, 2023 06:34PM

Re: -check_flip

Daniel Glen January 23, 2023 05:04PM

Re: -check_flip

Matthew Hoptman January 23, 2023 06:54PM