How to know whether (t)SSS was applied, and which channels were interpolated?

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  • MNE version: 0.24.1
  • operating system: macOS Monterey and Ubuntu Linux 18.04 LTS

Hello,

I wanted to ask if there exists a reliable and user-friendly way to figure out

  • whether (temporal) SSS (either via MaxFilter or MNE’s built-in Maxwell filtering) has been applied to a Raw instance?
  • which channels (if any) have been interpolated during this procedure?
  • which (t)SSS parameters were used?

I’m working with Elekta NeuroMag MEG data from @sophie.

I do remember there was some heuristic I could use based on the Info structure, but a) I don’t remember it anymore and b) I never got the impression this was really meant to be a user-visible thing – but I might be mistaken here.

Thanks,

Richard

cc @agramfort @larsoner

1 Like
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Would it not even make sense to have this information easily available in the info, like the the filters, sampling frequency, baseline…? So we know the history of the file.

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it’s already there. See eg:

In [1]: import mne
In [2]: raw = mne.io.read_raw(‘sub-01_task-somato_meg.fif’)
In [3]: raw.info[‘proc_history’]

Alex

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Thanks @agramfort! But this doesn’t seem to contain info about channel interpolations, right?

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it stores stuff done with maxwell_filter that’s it

but yes we could use this proc_info for more stuff

A

1 Like
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Yes, I’m asking because Maxwell filtering interpolates bad channels too :slight_smile:

But nice if you believe we could use this structure for more stuff, maybe we can discuss this during tomorrow’s dev meeting?