Hi Doug, Can you point out the name of file that I should be looking at?
I assumed they were either the mcextreg and mcprextreg output files, but these only have 6 columns. Thanks, New Fei > Hi New Fei, I did some digging and found the docs for the output (pasted > below). Translations (displacement) are in mm, rotations are in degrees > doug > > 1. n : time point > 2. roll : rotation about the I-S axis (degrees CCW) > 3. pitch : rotation about the R-L axis (degrees CCW) > 4. yaw : rotation about the A-P axis (degrees CCW) > 5. dS : displacement in the Superior direction (mm) > 6. dL : displacement in the Left direction (mm) > 7. dP : displacement in the Posterior direction (mm) > 8. rmsold : RMS difference between input frame and reference frame > 9. rmsnew : RMS difference between output frame and reference frame > 10. trans : translation (mm) = sqrt(dS^2 + dL^2 + dP^2) > > > On 09/13/2012 11:21 AM, New Fei Ho wrote: >> Hi Doug, >> >> To explicitly clarify, does this mean >> X: L-R >> Y: Anterior-Posterior >> Z: Inferior-Superior >> >> And are the values of translation/rotation in millimetres? >> >> Thanks, >> New Fei >> >> >>> If by XYZ you mean column, row, slice, then yes. The values are with >>> respect to the middle time point (or whatever you used as the >>> template), >>> it is not the relative difference. >>> doug >>> >>> On 09/12/2012 05:37 PM, New Fei Ho wrote: >>>> Hi, >>>> >>>> I would like to compare the mean head motion between two groups. >>>> >>>> Just to clarify the values found in the mcprextreg file: >>>> 1. Do the six columns represent translationX, translationY, >>>> translationZ >>>> and rotationX, rotationY, rotationZ? >>>> >>>> 2. Are the values found in each time-point (i) absolute, i.e. the >>>> absolute >>>> difference in displacement between this time-point and the middle >>>> time-point, or (ii) relative i.e. difference between consecutive >>>> time-points? >>>> >>>> Thanks, >>>> Newfei >>>> _______________________________________________ >>>> Freesurfer mailing list >>>> Freesurfer@nmr.mgh.harvard.edu >>>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>>> >>>> >>> -- >>> Douglas N. Greve, Ph.D. >>> MGH-NMR Center >>> gr...@nmr.mgh.harvard.edu >>> Phone Number: 617-724-2358 >>> Fax: 617-726-7422 >>> >>> Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting >>> FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html >>> >>> _______________________________________________ >>> Freesurfer mailing list >>> Freesurfer@nmr.mgh.harvard.edu >>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer >>> >>> >>> >> > > -- > Douglas N. Greve, Ph.D. > MGH-NMR Center > gr...@nmr.mgh.harvard.edu > Phone Number: 617-724-2358 > Fax: 617-726-7422 > > Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting > FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html > > >
mcextreg
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mcprextreg
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Log file for mcdat2extreg Mon Feb 6 23:27:42 EST 2012 setenv SUBJECTS_DIR /space/audrey/1/users/FSFASTFC/ cd /autofs/cluster/maury/users/newfei/GSP_STRUCTURALS/ALOB/rest /usr/local/freesurfer/stable5_1_0/fsfast/bin/mcdat2mcextreg --i 020/fmc.mcdat --o 020/mcextreg freesurfer-Linux-centos4_x86_64-stable-v5.1.0-20110514 Linux compute-0-2.local 2.6.18-53.1.19.el5 #1 SMP Tue Apr 22 03:01:10 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux
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