bloyl
April 29, 2021, 8:45pm
1
This is mostly a curiosity, but I’m wondering if anyone has any information on the CTF helmet that is displayed by plot_alignment.
Is it based on the actual ctf hardware or is it just a surface created at some point for display?
cc @larsoner
larsoner
April 29, 2021, 9:01pm
2
@agramfort got me a STL mesh (I don’t know the origin beyond this) via email and I came up with:
mne-tools:master ← larsoner:ctf
opened 08:11PM - 21 Aug 18 UTC
@agramfort I have no idea what CTF systems are like, so it would be good if ther… e were some CTF person who could check. Or even better, if there is a CTF + MRI where the head is known to be against the helmet, we could actually use `plot_alignment` to check that the head is up against the helmet.
The STL file was in a weird orientation with no reference to sensor positions so [I had to manually correct for it](https://gist.github.com/larsoner/866ef22e15b6a8d09d7f7cdc32e756eb) basically by trying to get the sensors to be a uniform distance from the interior of the helmet. Resulting output:
EDIT: Updated
Based on the mesh I assume it’s based on hardware. Alex if you want to search your email to refresh your memory, it’s from back around August 28, 2018
bloyl
April 29, 2021, 9:46pm
3
Thats good to know.
Maybe I’ll test it (as you suggest in the PR) one of these days and see how it holds up.