Hi Julia
I’m not sure what a group-level dice map would be. Maybe you are talking about
an accuracy map? Like how often a single point is in one label vs. another? For
individual cortical labels you can generate this for each label across subjects
using mris_spherical_average. If you really mean Dice it won’t give you a map –
it gives you 1 number per pair of subjects per label. You can certainly compute
that for each pair, or to some target, then compute the mean and variance of
that
Cheers
Bruce
From: freesurfer-boun...@nmr.mgh.harvard.edu
<freesurfer-boun...@nmr.mgh.harvard.edu> On Behalf Of Hye Min Shin
Sent: Wednesday, June 23, 2021 10:00 AM
To: freesurfer@nmr.mgh.harvard.edu
Subject: [Freesurfer] Calculating group-wise Dice Similarity Coefficient and
corresponding surface map
External Email - Use Caution
Hello experts,
I apologize if this has been asked before- but I couldn't find a question that
was similar to what I wanted to know about so I decided to ask this question(s).
I am trying to calculate dice similarity coefficient (DSC) for a group of
subjects and I was wondering if it is possible to calculate this on FreeSurfer.
I understand that FreeSurfer has mri_compute_overlap that can compute dice
coefficient but I wasn't sure if this can be done on group-level. Do I have to
first calculate dice for each subject and then calculate the average dice for
the subjects?
Also I was wondering if there is a way to visualize group-level dice
coefficient map on inflated lh/rh surface.
Best,
Julia Shin
_______________________________________________
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 Mass General Brigham
Compliance HelpLine at http://www.massgeneralbrigham.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.
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.
