Hi Wichian,
Caret has capabilities for importing and visualizing a variety of
spatially localized data. I am not aware of any groups that have
imported ERP data into Caret, nor am I familiar with the particular
data formats generated from ERP analyses. However, we would like to
encourage this, especially since it would be valuable to use our new
PALS human cortical atlas (http://www.ncbi.nlm.nih.gov/entrez/
query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=16172003;
http://dx.doi.org/10.1016/j.neuroimage.2005.06.058) to bring ERP data
into a common spatial framework with a growing amount of other
neuroimaging data that resides in our Sumsdb database (http://
sumsdb.wustl.edu/sums/).
As Morgan indicated, if your data are distributed and voxel-based,
then they can be read directly into Caret if they are in standard
volumetric format (e.g., Analyze, AFNI) or can be converted to such.
If you have dipole data, it should be possible to read in the
coordinates as a 'foci' file, with format specifications described in
the Caret Help menu (Files: File formats). Caret currently doesn't
have the capability to show dipole vector orientation, though that
should not be difficult to incorporate as a new feature if there is
general interest.
If neither of these strategies will work for your needs, we will need
to know more about the technical specifics of the problem.
David VE
On Dec 17, 2005, at 3:43 AM, Morgan Hough wrote:
I don't speak for the Caret developers but since morning arrives
earlier
for me I will reply first. I don't know of any source localization
functionality in Caret although once you have data localized you can
then treat it like FMRI data (I am speaking more of distributed
solutions rather than dipole results). There are some open source
packages for doing the localization but most of them do require
MATLAB.
You can find links from http://www.fmrib.ox.ac.uk/~mhough/matlab.html.
BrainStorm, EEGLAB, fieldtrip and now spm5 all have some source
localization functionality. It really depends on what you want to
do. Do
you want to do cortically constrained distributed solutions or some
dipole fitting? How many electrodes do you have? BTW, if you don't
have
MATLAB you can get fieldtrip to work with octave if you use the
version
from the NIMH MEG center (I should add that as a link too really).
Hope this helps.
Cheers,
-Morgan
On Sat, 2005-12-17 at 15:21 +0700, Wichian Sittiprapaporn wrote:
Dear Caret Members,
I have recently installed the Caret program into my lab. Could anyone
let me know whether the Caret can import the ERP data in order to
visulaize the brain localization?
With best regards,
--
Wichian Sittiprapaporn, Ph.D.
Electroneurophysiology Laboratory
Neuro-Behavioural Biology Center
Mahidol University, Salaya
Nakhon Pathom 73170
THAILAND
Telephone +(662) 441-9321
Fax +(662) 441-9743
Mobile +(661) 444-0261
Email: [EMAIL PROTECTED]
Email: [EMAIL PROTECTED]
Web: http://neuroscience.mahidol.ac.th
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