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Hello Freesurfer experts,
When I exported the Destrieux and Desikian-Killiany volume values from Freesurfer to SPSS I obtained "strange" eTIV values with 16 digits as follows:
101,632,104,008.0000 134,253,072,953.0000 155,967,056,944.0000 142,085,122,028.0000 181,105,664,397.0000 118,051,287,519.0000 896,135,067,103.0000
With how many decimals Freesurfer exports the eTIV values ?, that is, what is the precision of this measure? I do not know how many decimals this measure has.
Another doubt, it is necessary to make some kind of numerical transformation on the eTIV values before including it as a covariate in the statistical analysis (for example, a logarithmic transformation).
Best,
External Email - Use Caution
Hello Freesurfer developers,
Did hoy have chance to read this question?.
Thank you very much for your help!
Best regards,
---------- Forwarded message --------- From: Miguel Ángel Rivas Fernández miguelrivasfdez@gmail.com Date: mar., 4 sept. 2018 20:37 Subject: strange eTIV values To: Freesurfer support list freesurfer@nmr.mgh.harvard.edu
Hello Freesurfer experts,
When I exported the Destrieux and Desikian-Killiany volume values from Freesurfer to SPSS I obtained "strange" eTIV values with 16 digits as follows:
101,632,104,008.0000 134,253,072,953.0000 155,967,056,944.0000 142,085,122,028.0000 181,105,664,397.0000 118,051,287,519.0000 896,135,067,103.0000
With how many decimals Freesurfer exports the eTIV values ?, that is, what is the precision of this measure? I do not know how many decimals this measure has.
Another doubt, it is necessary to make some kind of numerical transformation on the eTIV values before including it as a covariate in the statistical analysis (for example, a logarithmic transformation).
Best,
Canyou give more info on how you arrived at those numbers? Eg, are those the numbers after you imported into SPSS? If you look in an individual's aseg.stats file, do you see the same value?
On 09/06/2018 12:41 PM, Miguel Ángel Rivas Fernández wrote:
External Email - Use Caution
Hello Freesurfer developers,
Did hoy have chance to read this question?.
Thank you very much for your help!
Best regards,
---------- Forwarded message --------- From: *Miguel Ángel Rivas Fernández* <miguelrivasfdez@gmail.com mailto:miguelrivasfdez@gmail.com> Date: mar., 4 sept. 2018 20:37 Subject: strange eTIV values To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu mailto:freesurfer@nmr.mgh.harvard.edu>
Hello Freesurfer experts,
When I exported the Destrieux and Desikian-Killiany volume values from Freesurfer to SPSS I obtained "strange" eTIV values with 16 digits as follows:
101,632,104,008.0000 134,253,072,953.0000 155,967,056,944.0000 142,085,122,028.0000 181,105,664,397.0000 118,051,287,519.0000 896,135,067,103.0000
With how many decimals Freesurfer exports the eTIV values ?, that is, what is the precision of this measure? I do not know how many decimals this measure has.
Another doubt, it is necessary to make some kind of numerical transformation on the eTIV values before including it as a covariate in the statistical analysis (for example, a logarithmic transformation).
Best,
-- *Miguel Ángel Rivas Fernández*
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
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Hi Douglas,
Yes, I compared the eTIV values in the SPSS and in the individual aseg.stats files and I noticed that Freesurfer export this kind of measures with a precision of 6 decimals (eg. 1418761.222904)
The problem is that when I send these values from the txt (that contain all the measures of the aseg.stats file) to SPSS.
I will try to send the data from the txt to the SPSS without any distortion in the number of decimals.
Any help will be appreciated.
Best,
El jue., 6 sept. 2018 a las 20:16, Douglas N. Greve (dgreve@mgh.harvard.edu) escribió:
Canyou give more info on how you arrived at those numbers? Eg, are those the numbers after you imported into SPSS? If you look in an individual's aseg.stats file, do you see the same value?
On 09/06/2018 12:41 PM, Miguel Ángel Rivas Fernández wrote:
External Email - Use CautionHello Freesurfer developers,
Did hoy have chance to read this question?.
Thank you very much for your help!
Best regards,
---------- Forwarded message --------- From: *Miguel Ángel Rivas Fernández* <miguelrivasfdez@gmail.com mailto:miguelrivasfdez@gmail.com> Date: mar., 4 sept. 2018 20:37 Subject: strange eTIV values To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu mailto:freesurfer@nmr.mgh.harvard.edu>
Hello Freesurfer experts,
When I exported the Destrieux and Desikian-Killiany volume values from Freesurfer to SPSS I obtained "strange" eTIV values with 16 digits as follows:
101,632,104,008.0000 134,253,072,953.0000 155,967,056,944.0000 142,085,122,028.0000 181,105,664,397.0000 118,051,287,519.0000 896,135,067,103.0000
With how many decimals Freesurfer exports the eTIV values ?, that is, what is the precision of this measure? I do not know how many decimals this measure has.
Another doubt, it is necessary to make some kind of numerical transformation on the eTIV values before including it as a covariate in the statistical analysis (for example, a logarithmic transformation).
Best,
-- *Miguel Ángel Rivas Fernández*
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
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Douglas N. Greve -
Miguel Ángel Rivas Fernández