[FieldTrip] ICA before beamformer

[Herring, J.D. (Jim)]

Dear Anne,

If I am not mistaken SPM actually uses Fieldtrip’s DICS beamformer implementation.

In any case, after doing ICA the grad field in your data structure should be corrected so you should be safe in using SPM's beamformer given that you use the grad contained in the data structure produced after cleaning with ICA in Fieldtrip. 

Best,

Jim
> On 21 Apr 2015, at 18:59, Anne Keller <anne.keller at sickkids.ca> wrote:
> 
> Hi Fieldtrip-ers,
> 
> I'm working with MEG data collected from children, and I am hoping to do source localization via beamformer. Our kids have lots of eye movement and blinks, so I was hoping to perform ICA prior to beamformer. How can I address the matrix regularization aspect after I remove components? Is there a fieldtrip function that corrects this? Due to lab requirements, I will be using SPM's beamformer (but Fieldtrip's ICA and reject components functions).
> 
> Thanks so much in advance!
> 
> Best,
> Anne
> 
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