A question about SEEG

Discussions
1

When I view the SEEG epileptogenicity maps in Tutorials, I can’t understand the 3 coordinate systems(MRI,SCS and MNI).

I need your help.Thank you !

2

Hello,

If you are planning to use Brainstorm routinely, I recommend you start by reading the introduction tutorials (section “Get started” on the tutorial page), using the corresponding example dataset, at least until #19:
https://neuroimage.usc.edu/brainstorm/Tutorials

These tutorials will take you through all the details of the software, before you try to use it on your own datasets, or before you read any advanced tutorial. Example:
https://neuroimage.usc.edu/brainstorm/Tutorials/ImportAnatomy#Fiducial_points
https://neuroimage.usc.edu/brainstorm/CoordinateSystems

Francois

3

Thank you for your reply,

I think I have understood the 3 coordinate system.

Now I have a new question that how the positions of the SEEG contacts (the txt file) was got.Or I don’t know the position of the SEEG belongs to which coordinate system.

zhipeng

4

The position of the SEEG contacts were obtained with Brainstorm, and exported in the SCS coordinate system:
https://neuroimage.usc.edu/brainstorm/Tutorials/Epileptogenicity#Editing_the_contacts_positions

To convert them to MNI coordinates:
https://neuroimage.usc.edu/brainstorm/CoordinateSystems#MNI_coordinates
https://neuroimage.usc.edu/brainstorm/CoordinateSystems#Converting_between_coordinate_systems