If I understand you correctly, you have an ROI defined in the volume and
you want to transfer it to the surface. Is that right? First you should
look at the ROI in the volume along with the surfaces and make sure that
they pass through the ROI. I would generally use the projfrac-max option
for something like this. After you get a surface overlay, you can map it
back to the volume (mri_surf2vol) and see if it looks right relative to
the full volume ROI.
On 5/21/2021 6:41 AM, M Pope wrote:
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Hi all,
I have a question regarding checking the output of mri_vol2surf. I am
converting a manually segmented volume ROI into a surface label in
order to gain information such as cortical thickness.
What is the best practice for quality control and checking the surface
rendering of the ROI? Are there any protocols or suggestions? As
slight changes in projfrac change the output by a large degree, it's
difficult to assess what is the closest to the original volume ROI.
The suggestions also vary (others say projfrac 0.5, others to use
projfrac-max or projdist). The main output statistic I'm interested in
cortical thickness of the region (if this influences the options).
How do you choose and establish what is the best option?
Thanks
Marianna
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