I’d like to rotate a plumb anat to match an oblique EPI (without moving the EPI at all) so that they overlap correctly.
Before operation, 3dinfo said the anat was “plumb” and the EPI was “oblique”.
Then I called:
3dWarp -card2oblique EPI -prefix anat -overwrite anat+orig
After the operation, the anat image was rotated as expected, and aligned well with the EPI.
However, 3dinfo still claimed that the anat was “plumb”, rather than oblique as the EPI.
And when I overlaid the EPI on the rotated anat, AFNI complained about mismatched orientation.
Is this behavior expected? (It seems quite counterintuitive to me.)
Or am I missed something?