why don't you use the gray/white contrast map that freesurfer produces?
On 04/02/2012 04:24 PM, John Fredy wrote:
Dear Douglas and David,
I am trying to know the gray-white contrast in images from epileptic patients. In know that I can use the freesurfer surface to obtain the coordinates for the interface between gray-white substance, but some help is welcome because the paper that I read introduce elements like use the data 0.5 before and 0.5 after the interface
How I can convert the surface to voxel coordinates?
How I can obtain the data (0.5 mm) out of the resolution of my images (that is 1 mm)?
Any interpolation suggestion?
Exists some code that I can use
Thanks in advance
John Ochoa Bioingeniería Universidad de Antioquia
On Mon, Apr 2, 2012 at 12:12 PM, Bruce Fischl <fischl@nmr.mgh.harvard.edu mailto:fischl@nmr.mgh.harvard.edu> wrote:
Hi John Doug and David (ccd) can point you in the right direction once you are done with your surface recons cheers Bruce On Mon, 2 Apr 2012, John Fredy wrote: Dear Bruce, I have interest in the tools that you mentioned Best John Ochoa On Sat, Mar 31, 2012 at 5:31 PM, Bruce Fischl <fischl@nmr.mgh.harvard.edu <mailto:fischl@nmr.mgh.harvard.edu>> wrote: Hi John we can provide that for you if you download and install FreeSurfer, then run recon-all on your data. We also provide tools for computing gray/white contrast once recon-all has been run. cheers Bruce On Sat, 31 Mar 2012, John Fredy wrote: Hello all, I am looking for a white-gray matter contrast algorithm I see the publication: Individual Differences in Verbal Abilities Associated with Regional Blurring of the Left Gray and White Matter Boundary http://www.ncbi.nlm.nih.gov/pubmed/22031871 But,how I can obtain the coordinates of the interface between gray and white matter? Thanks in advance The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.