Hi Ed,
I hope that the fact you are now asking about MNI - tlrc transforms
means that you got your flirt registrations to work ok in the end.
For MNI-tlrc I assume you are talking about the transformation that
Matthew Brett has developed.
It would be possible to code this up as a warp field and then
apply it using applywarp.
You would just have to go through each voxel, use the coordinate
transformation and save the result in a warp field (3 x 3D volumes,
saved as a 4D volume, one for each coordinate component).
The difficulty would be getting the origin and axes correct, especially
for viewing in other software like AFNI. I'm afraid I don't quite know
enough about AFNI to make this work though. If anyone does know
how to set the AFNI origin and axes for a general analyze image
then we should be able to get this approach to work fine.
Cheers,
Mark
On Thursday, November 14, 2002, at 10:26 AM, Edward Vessel wrote:
Edward Vessel <<[log in to unmask]>
Hi there -
After using flirt to normalize subjects to the avg152T1 brain, I'd
like to
further transform these datasets into tlrc coordinates (and,
preferably, a
tlrc box as well) so that the labels and coordinates given in AFNI are
more
correct. I am a aware of a few programs which take single MNI
coordinate
values and output the tlrc values, but I was wondering if there is a
tool to
convert whole 3D volumes(in analyze or AFNI format) from MNI space to
tlrc.
thanks,
Ed
--
Ed Vessel
U. of Southern California [log in to unmask]
Dept. of Neuroscience
HNB, 3641 Watt Way
1A1A,1A1A,FFFFhttp://geon.usc.edu/~vessel
Los Angeles, CA 90089-2520
(213) 740-6102
