[FieldTrip] doing ica on magnetometers and gradiometers
thomas.hartmann at th-ht.de
Wed Mar 21 11:02:14 CET 2018
we have had a vivid discussion in our group concerning whether apply ICA
to magnetometers and gradiometers in one go (i.e. lumping them together)
or whether it is necessary to apply the ICA on mags ands grads
separately. most approaches that can be found on the internet seem to
favor the do-it-in-one-go way.
my main concern with applying it to both sensor types at the same time
is that the resulting components will probably be a linear mixture of
both sensor types. when i reject some components and the project the
components back to the sensor space, gradiometer activity should "leak"
into the magnetometer data and vice versa.
or am i wrong with my thoughts? or does it just not matter at all?
i am looking forward to reading your thoughts!
Dr. Thomas Hartmann
Centre for Cognitive Neuroscience
Tel: +43 662 8044 5109
Email: thomas.hartmann at th-ht.de
"I am a brain, Watson. The rest of me is a mere appendix. " (Arthur Conan Doyle)
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