Hi Anastasia,
you´re right, the values are reasonable! The problem is that I cannot read out all the decimal places that I can see in FreeView as described! When I save the values of distinct ROIs to a .stats file, I can only see e.g. 0.0007 but I need 0.000770333 for further processing. Do you have any suggestions how I can get more decimal places on a .stats file?
Thanks a lot, Tom
Gesendet: Mittwoch, 11. Februar 2015 um 17:39 Uhr
Von: "Anastasia Yendiki" <ayend...@nmr.mgh.harvard.edu>
An: "Freesurfer support list" <freesurfer@nmr.mgh.harvard.edu>
Betreff: Re: [Freesurfer] DTI question
Von: "Anastasia Yendiki" <ayend...@nmr.mgh.harvard.edu>
An: "Freesurfer support list" <freesurfer@nmr.mgh.harvard.edu>
Betreff: Re: [Freesurfer] DTI question
Hi Tom - These are reasonable values for mean diffusivity (a.k.a. ADC). Only FA is normalized to take values in the 0-1 range. a.y On Wed, 11 Feb 2015, Thomas Potrusil wrote: > Dear FreeSurfers! > A question concerning DTI analysis came up: > > I already run dt_recon on my dataset which works very well. I also used the output to extract FA-values of distinct ROIs - no Problem. Now I want to do the same for ADC but I only get > values in my .stats files like 0.0007 or 0.0008. > I use the following code: > > dt_recon --i $dcmfile --b bvals bvecs --s $subj --o $outdir_dt_recon > > mri_vol2vol --mov $outdir_dt_recon/adc.nii \ --reg $outdir_dt_recon/register.dat \ --fstarg --interp nearest \ --o $outdir_dt_recon/adc.anat.mgh > > mri_segstats \ --seg $SUBJECTS_DIR/$subj/mri/wmparc.mgz \ --ctab $FREESURFER_HOME/FreeSurferColorLUT.txt \ --id 12 --id 51 --id 2 --id 41 --id 16 --id 13 --id 52 --id 27 --id 59\ > --i $outdir_dt_recon/adc.anat.mgh --seg-erode 1 --sum $outdir_dt_recon/adc.stats > > When I load adc.anat.mgh into FreeView and scroll to a ROI, I can see a value like 0.000770333! This means (for me) that the value is 'there' but has to be multiplied by 10^3?! Do you > have any suggestions how I can get these values to a .stats file? > > Thanks a lot, > Tom > >_______________________________________________ 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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