What Doug said, but note that those decimals are getting dangerously close to machine roundoff error territory, so I'd be cautious if the effect that you're trying to detect is in that territory.
> You can add something like --mul 1000 to the mri_segstats command line > to multiply the values by 1000 to get 3 more decimal places > doug > > On 02/12/2015 02:06 AM, Thomas Potrusil wrote: >> 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 >> 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. >> >> >> _______________________________________________ >> 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: https://gate.nmr.mgh.harvard.edu/filedrop2 > www.nmr.mgh.harvard.edu/facility/filedrop/index.html > Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
