[FieldTrip] standard_1005.elc cannot be aligned with the headmodel with type of openmeeg

[Schoffelen, J.M. (Jan Mathijs)]

Hi Jinwen,

I don’t know the answer to your question. Have you checked whether the models are expressed in the same coordinate system? (is the nose pointing into the same direction etc)

Best,
Jan-Mathijs


On 3 Nov 2021, at 14:19, Jinwen Wei via fieldtrip <fieldtrip at science.ru.nl<mailto:fieldtrip at science.ru.nl>> wrote:

Dear all,

I came across an issue about alignment while analyzing source-level connectivity by following the tutorial (https://www.fieldtriptoolbox.org/tutorial/networkanalysis_eeg/#computation-of-the-forward-model<https://urldefense.com/v3/__https://www.fieldtriptoolbox.org/tutorial/networkanalysis_eeg/*computation-of-the-forward-model__;Iw!!HJOPV4FYYWzcc1jazlU!uvz1WO7GtQJtPHUj7C5BgCs1xW_f2CKjLmjoohcZB8kNPf39E_meFRgaigxb4t1nKC9r5uKwkHCPwGA$>). I could not align the standard_1005.elc with the headmodel_eeg downloaded in  ftp://ftp.fieldtriptoolbox.org/pub/fieldtrip/tutorial/networkanalysis_eeg/<https://urldefense.com/v3/__ftp://ftp.fieldtriptoolbox.org/pub/fieldtrip/tutorial/networkanalysis_eeg/__;!!HJOPV4FYYWzcc1jazlU!uvz1WO7GtQJtPHUj7C5BgCs1xW_f2CKjLmjoohcZB8kNPf39E_meFRgaigxb4t1nKC9r5uKwMPJLx7k$>.

However, the standard_1005.elc could be well aligned with the standard_bem headmodel with the type of "dipoli" (https://www.fieldtriptoolbox.org/template/headmodel/<https://urldefense.com/v3/__https://www.fieldtriptoolbox.org/template/headmodel/__;!!HJOPV4FYYWzcc1jazlU!uvz1WO7GtQJtPHUj7C5BgCs1xW_f2CKjLmjoohcZB8kNPf39E_meFRgaigxb4t1nKC9r5uKwFhqy_Fs$>). Then the problem must come from the difference between two headmodels. However, there was little information about the headmodel_eeg with the type of "openmeeg".

So what is the difference between those two headmodels provided by different tutorials? How could I align the standard_1005.elc well with the headmodel_eeg with the type of "openmeeg"?

Thank you in advance.

Best regards,
Jinwen
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