[FieldTrip] automatic artifact correction after virtual channels/beamformer

[Haiteng Jiang]

>
> Hi  Tyler ,
>
          I think it makes sense to apply  the inverse spatial filter on
the  the marked out data  since you build it on this interval.  In other
words, non-marked out  intervals   data has different  inverse filter.  I
don't understand  appending  trials after  automatic artefact   detection.
 Do you mean keep trials after automatic artefact   detection ?

                                                                 Best,
                                                                 Haiteng

>
> Message: 3
> Date: Mon, 14 Apr 2014 07:26:44 +0000
> From: Tyler Grummett <tyler.grummett at flinders.edu.au>
> To: FieldTrip discussion list <fieldtrip at science.ru.nl>
> Subject: Re: [FieldTrip] automatic artifact correction after    virtual
>         channels/beamformer
> Message-ID:
>         <
> 149bb27d65e749c5b37bb3bfab16e87b at SIXPR03MB368.apcprd03.prod.outlook.com>
>
> Content-Type: text/plain; charset="us-ascii"
>
> Hello Haiteng,
>
>
> Thankyou for the response. Yes I have gone through the tutorial. I use
> clean data to make the inverse spatial filter. But do then apply it to
>
> marked out data or can apply it to non-marked out data. Also, is there a
> way to append trials after you run an automatic artefact
>
> rejection algorithm over it? At the moment, I am trying to use a function
> that requires equal trial lengths. I can use ft_redefinetrial
>
> to grab a 2 second epoch from each 'trial'. However that feel a little
> crude as I am throwing out a lot of data.
>
>
> Your help will be greatly appreciated.
>
>
> Tyler
>
>
> *************************
>
> Tyler Grummett ( BBSc, BSc(Hons I))
> PhD Candidate
> Brain Signals Laboratory
> Flinders University
> Rm 5A301
> Ext 66124
> ________________________________
> From: fieldtrip-bounces at science.ru.nl <fieldtrip-bounces at science.ru.nl>
> on behalf of Haiteng Jiang <haiteng.jiang at gmail.com>
> Sent: Monday, 14 April 2014 3:53 PM
> To: fieldtrip at science.ru.nl
> Subject: Re: [FieldTrip] automatic artifact correction after virtual
> channels/beamformer
>
> Hi Tyler,
>    It is always nice to computate virtual MEG channels based on
> artifact-corrected  CLEAN data .  Note that  we use clean data to get the
> inverse spatial filter by DICS.  Regrading  to how to create virtual
> channel , please have a look at tutorial:
> http://fieldtrip.fcdonders.nl/tutorial/shared/virtual_sensors
>
>                                                              Best,
>                                                              Haiteng
>
>
>
> Message: 2
> Date: Mon, 14 Apr 2014 02:54:16 +0000
> From: Tyler Grummett <tyler.grummett at flinders.edu.au<mailto:
> tyler.grummett at flinders.edu.au>>
> To: FieldTrip discussion list <fieldtrip at science.ru.nl<mailto:
> fieldtrip at science.ru.nl>>
> Subject: [FieldTrip] automatic artifact correction after virtual
>         channels/beamformer
> Message-ID:
>         <
> d9f26aff9ba640b29bfa36febf84e9cc at SIXPR03MB368.apcprd03.prod.outlook.com
> <mailto:
> d9f26aff9ba640b29bfa36febf84e9cc at SIXPR03MB368.apcprd03.prod.outlook.com>>
>
> Content-Type: text/plain; charset="us-ascii"
>
> ?Hello all,
>
>
> I was just wondering whether it is necessary to use the artifact corrected
> data when creating virtual channels from beamformer sources
>
> or whether you are able to use original, non-artifact corrected data.
>
>
> Tyler
>
>
> *************************
>
> Tyler Grummett ( BBSc, BSc(Hons I))
> PhD Candidate
> Brain Signals Laboratory
> Flinders University
> Rm 5A301
> Ext 66124
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> ------------------------------
>
>
>
>
> --
> Haiteng Jiang
> PhD candidate
> Neuronal Oscillations Group
> Donders Institute for Brain, Cognition and Behaviour
> Centre for Cognitive Neuroimaging
> Radboud University Nijmegen
>
> Visiting address
> Room 2.32
> Donders Centre for Cognitive Neuroimaging
> Kapittelweg 29
> 6525 EN  Nijmegen
> the Netherlands
>
>  Tel.: +31 (0)243668291
>  Web:  https://sites.google.com/site/haitengjiang/
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> End of fieldtrip Digest, Vol 41, Issue 25
> *****************************************
>



-- 
Haiteng Jiang
PhD candidate
Neuronal Oscillations Group
Donders Institute for Brain, Cognition and Behaviour
Centre for Cognitive Neuroimaging
Radboud University Nijmegen

Visiting address
Room 2.32
Donders Centre for Cognitive Neuroimaging
Kapittelweg 29
6525 EN  Nijmegen
the Netherlands

 Tel.: +31 (0)243668291
 Web:  https://sites.google.com/site/haitengjiang/
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