Hi Martin, Now clear. Thanks. Yawu On Mon, Jul 6, 2015 at 8:50 PM, Martin Reuter <mreu...@nmr.mgh.harvard.edu> wrote:
> Hi Yawu, > > no, that would be the simple average. > Temporal average is the linear fit (within each subject) evaluated at the > mid time. So if you had 10 time points at the same day and 1 a year later, > it would look like a .5 years time point. This is used to compute > symmetrized percent change, representing the change with respect to the > temporal average to make it more symmetric. > > Cheers, Martin > > > On 07/03/2015 08:43 AM, Liu Y wrote: > > Dear Freesurfer experts > > In the command "long_mris_slopes --qdec ./qdec/long.qdec.table.dat > --meas thickness --hemi lh --do-avg --do-rate --do-pc1 --do-spc --do-stack > --do-label --time years --qcache fsaverage --sd $SUBJECTS_DIR", Do-avg will > compute > the temporal average. I do not quite understand the "temporal average" Is > the average of baseline and followup thicknesses? > > Best regards, > Yawu > > > > > > _______________________________________________ > Freesurfer mailing > listfreesur...@nmr.mgh.harvard.eduhttps://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > -- > Dr. Martin Reuter > > Instructor in Neurology > Harvard Medical School > Assistant in Neuroscience > Dept. of Radiology, Massachusetts General Hospital > Dept. of Neurology, Massachusetts General Hospital > Research Affiliate > Computer Science and Artificial Intelligence Lab, > Dept. of Electrical Engineering and Computer Science, > Massachusetts Institute of Technology > > A.A.Martinos Center for Biomedical Imaging > 149 Thirteenth Street, Suite 2301 > Charlestown, MA 02129 > > Phone: +1-617-724-5652 > Email: > mreu...@nmr.mgh.harvard.edu > reu...@mit.edu > Web : http://reuter.mit.edu > > > _______________________________________________ > 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. > >
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