Hi Mateus,
Your question throws me a little bit, but I'll try to provide a helpful
answer.
When you register your surface to PALS_B12.LR, one of the resulting
files in the atlas target directory is a file named like
"def*Fiducial*coord" -- what David calls the "resampled" fiducial. (He
doesn't like to use the word "deformed," because that implies that the
surface is being distorted to match some target; in fact, the file named
like "def*Fiducial*coord" is indistinguishable from the original surface
by eye. It's actually slightly smoother than the original surface,
resulting in a 7% surface area reduction.) If you click on a node in
the individual surface, you'll get a node number and 3D coordinate in
the Identify Window. If you click on roughly the same node in the
resampled fiducial surface, you'll get a different node number -- even
if you're extremely careful and pick the exact corresponding location,
because your original surface has one mesh (e.g., say 54,040 nodes),
while the PALS_B12.LR resampled surface has 73,730 nodes. But you
should get virtually the same 3D coordinate.
Now, you can also open PALS_B12.LR average fiducial surfaces in the same
session as your def*Fid*coord file -- any of these coords included in
your Caret data_files/fmri_mapping_files:
Human.PALS_B12.LEFT_AVG_B1-12.FIDUCIAL_711-2C.clean.align.73730.coord
Human.PALS_B12.LEFT_AVG_B1-12.FIDUCIAL_AFNI.clean.73730.coord
Human.PALS_B12.LEFT_AVG_B1-12.FIDUCIAL_FLIRT.clean.73730.coord
Human.PALS_B12.LEFT_AVG_B1-12.FIDUCIAL_MRITOTAL.clean.73730.coord
Human.PALS_B12.LEFT_AVG_B1-12.FIDUCIAL_SPM2.clean.73730.coord
Human.PALS_B12.LEFT_AVG_B1-12.FIDUCIAL_SPM95.clean.73730.coord
Human.PALS_B12.LEFT_AVG_B1-12.FIDUCIAL_SPM96.clean.73730.coord
Human.PALS_B12.LEFT_AVG_B1-12.FIDUCIAL_SPM99.clean.73730.coord
If you open one or more of these surfaces in a Window 2 and click on
nodes, then you'll get two different 3D coordinates for the same node.
Which you use to report your findings is your call.
David also encourages authors to report Latitude and Longitude, when
available. For PALS_B12.LR, make sure the latlon file is loaded when
you run reports under Surface: ROI.
I hope this helps, but it probably won't.
On 12/07/2006 12:19 PM, Mateus Joffily wrote:
Hi,
I have registred one individual surface into PALS-B12 (using
Human.PALS_B12.LR.REGISTER-with-INDIVIDUAL.73730.spec). I would like
to know the talairach coordinate of a voxel in the registered surface.
Is it possible?
Thanks for your help,
Mateus
___
caret-users mailing list
caret-users@brainvis.wustl.edu
http://pulvinar.wustl.edu/mailman/listinfo/caret-users
