[Mne_analysis] Use of Maxwell filtering with 4-D Neuroimaging / BTI data

[Eric Larson]

        External Email - Use Caution        

I have not done much testing with BTi system data, but it's on the to-do
list (so the bullet points of caveats have not changed). Please feel free
to try and see how it works for your data. You might try setting
`ignore_ref=True`, I seem to remember someone working with BTi data and
having this be the case (though I could be wrong about this).

Eric


On Tue, Jun 12, 2018 at 11:31 AM Maria Hakonen <maria.hakonen at gmail.com>
wrote:

>         External Email - Use Caution
>
> Dear all,
>
> Does anyone have experience of the use of Maxwell filter with 4-D
> Neuroimaging / BTI data?  Is there something specific e.g. with the
> parameters that I should take into account if I apply Maxwell filter to 4-D
> Neuroimaging / BTI data, or would it be better not to use Maxwell filter?
> The mne python documentation says " Use of Maxwell filtering routines
> with non-Elekta systems is currently experimental. Worse results for
> non-Elekta systems are expected due to (at least):
>
>
>    - Missing fine-calibration and cross-talk cancellation data for other
>    systems.
>    - Processing with reference sensors has not been vetted.
>    - Regularization of components may not work well for all systems.
>    - Coil integration has not been optimized using Abramowitz/Stegun
>    definitions."
>
> Are there any updates to this information?
>
> Best,
> Maria
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