Dear Venkat,
I believe the most straight forward way is to use your gamma volumes. For example if your first contrast is the difference between two time-points, thickness difference could be extracted with this command line:
mri_convert ~/glmdir/contrast/gamma.mgh difference_thickness.mgh --frame 0
gamma.mgh files are contrast size. They are called COPE in FSL and con images in SPM.
However If you are looking to have the rate of linear volume change you might need to use the slope of regression line which could be extracted with least-squares approach in MATLAB, you might be able to do it in FS but im not sure how.
All the best,
Arman
On Mon, Aug 13, 2012 at 6:31 PM, Rajagopalan, Venkateswaran < rajagov2@ccf.org> wrote:
**
Dear All,
I would like to display my cortical thickness chnages from longitudinal runs on my original T1-w volume images. I am wondering whether this is possible if so can anyone tell how I can do this.
Thanks in advance Venkat
===================================
Please consider the environment before printing this e-mail**** Cleveland Clinic is ranked one of the top hospitals in America by U.S.News & World Report (2010). Visit us online at http://www.clevelandclinic.orgfor a complete listing of our services, staff and locations. Confidentiality Note: This message is intended for use only by the individual or entity to which it is addressed and may contain information that is privileged, confidential, and exempt from disclosure under applicable law. If the reader of this message is not the intended recipient or the employee or agent responsible for delivering the message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please contact the sender immediately and destroy the material in its entirety, whether electronic or hard copy. Thank you.
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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.