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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bob cox
November 16, 2005 11:38AM
I guess the main reason why 3drotate and 3dvolreg cannot be used one after another is mainly because each step involve in some sort of interpolation. Doing the interpolation more than once can easily destroy the data badly.

This statement is **NOT** correct. What you are doing with your list of operations is

(a) using 3dvolreg to move the data around spatially, and also produce a list the movements

(b) throwing away the moved data, then moving it again in exactly the same way with 3drotate

(c) then using 3dvolreg to move the data around AGAIN

What the problem we have with this sequence is that it makes no sense whatsoever -- we cannot imagine what useful purpose is achieved by doing things this way. Just do step (a) itself, and use the registered output from that as your realigned data. Skip (b) and (c).
Subject Author Posted

motion correction

Lucy Qiu February 09, 2004 01:31PM

Re: motion correction

bob cox February 09, 2004 01:53PM

Re: motion correction and Mask

Lucy Qiu February 09, 2004 02:48PM

Re: motion correction and Mask

Robert Cox February 09, 2004 02:54PM

Re: motion correction

Ricky Tong November 09, 2005 11:36AM

Re: motion correction

yi November 10, 2005 10:39AM

Re: motion correction

Godot November 10, 2005 10:57AM

motion correction using 3drotate with -1Dfile

Ricky Tong November 11, 2005 10:32AM

Re: motion correction using 3drotate with -1Dfile

Godot November 13, 2005 11:31PM

Re: motion correction using 3drotate with -1Dfile

Ricky Tong November 16, 2005 10:51AM

Re: motion correction

bob cox November 16, 2005 11:38AM