That's so weird. Can you make the data available to us?

On 3/29/2022 8:00 AM, Samuel Paré wrote:

        External Email - Use Caution        

Hi Dough,

Thanks for your response. We followed your suggestion and ran the 7T data without the -highres option. This gave us values which are in the normal range of what we get when using 3T mean curvature data. We looked whether there was a fixed scaling factor between the data with and without the -highres option. This did not seem to be the case as the scaling factor for the different subregions varied between 1,18 (for the left G_subcallosal) and 2,95 (for the left S_collat_transv_ant). I attached a pdf with the results.

Thank you again

On Sun, Mar 27, 2022 at 5:31 PM Douglas N. Greve <dgreve@mgh.harvard.edu> wrote:

This does not make sense to me. What resolution is your 3T and 7T data? Can you run the 7T data at 1mm (ie, without the -hires option) and see if it changes?

On 3/20/2022 9:42 AM, Samuel Paré wrote:

        External Email - Use Caution        

Hello,

 

We are looking at some of our data acquired on a 7T magnet. We ran recon-all with the “highres” flag. The obtained results for cortical thickness and cortical volume are very comparable to data that we obtain when using 3 T brain images. However, the results for cortical curvature are significantly different from what we get by our 3 T data. I attach the output of mean cortical curvature values using the Destrieux atlas for a 3T and 7T dataset on healthy controls. As you can notice, they differ roughly by a factor of 2. Any explanation for what may cause this large difference?

 

Thanks,

 

Samuel

--

Samuel Paré, MSc

Laboratoire du développement et plasticité du système visuel

École d'optométrie

Université de Montréal

_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be 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 Mass General Brigham Compliance HelpLine at MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://www.massgeneralbrigham.org/complianceline <MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://www.massgeneralbrigham.org/complianceline> .
Please note that this e-mail is not secure (encrypted).  If you do not wish to continue communication over unencrypted e-mail, please notify the sender of this message immediately.  Continuing to send or respond to e-mail after receiving this message means you understand and accept this risk and wish to continue to communicate over unencrypted e-mail.

--

Samuel Paré, MSc

Laboratoire du développement et plasticité du système visuel

École d'optométrie

Université de Montréal

_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be 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 Mass General Brigham Compliance HelpLine at MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://www.massgeneralbrigham.org/complianceline <MailScanner has detected a possible fraud attempt from "secure-web.cisco.com" claiming to be https://www.massgeneralbrigham.org/complianceline> .
Please note that this e-mail is not secure (encrypted).  If you do not wish to continue communication over unencrypted e-mail, please notify the sender of this message immediately.  Continuing to send or respond to e-mail after receiving this message means you understand and accept this risk and wish to continue to communicate over unencrypted e-mail.