Sorry all -- my mistake.
I thought our folks here were regularly registering functional to
anatomical scans, and I thought it was done with 3dvolreg. Just now
checking, apparently not.
And if 3dAnatNudge can't do rotation, not so helpful (though lack of resize
should not be a problem).
It would be interesting to see what 3dvolreg would do if the anatomy was
resampled to the same grid as that functional scans or vice versa... but
starts to look like a research topic.
For Nate: It might be worth posting on the AFNI forum to see what other
AFNI-sters position on this topic is... doubtless it's been thought about a
lot more than by me!
Graham
Jeff Binder wrote:
The AFNI program 3dvolreg does coregistration only for volumes acquired
with the same kind of pulse sequence and consequently the same tissue
signal values. Use it for coregistering different EPI volumes to each
other or different T1-weighted structural scans to each other.
I think what Nate was asking about was coregistering EPI data to the
structural scans. The AFNI program 3dAnatNudge can help with this to some
extent. It uses simple iterative translational movements to find the best
fit between a "skull-stripped" anatomy volume and an EPI volume. No
rotation or resizing is done.
To use this program you remove the skull and other non-brain voxels from
the anatomy volume. The AFNI programs 3dIntracranial and a newer program
called 3dSkullStrip both do this.
Jeff
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