[FieldTrip] Signal Space Separation method for MEG data analysis

[Tom Holroyd (NIH/NIMH) [E]]

Just wanted to mention, the "SSS" method separates the signal into "inside" and "outside" the helmet (this is what MaxFilter does). So it is useless for removing dental artifacts.

McGowin, Inna wrote:
> Thank you Jörn for the info.
> 
> I was looking for SSS to perform a DC analysis of MEG data with no 
> motion correction.
> We have MEG datasets that are collected from subjects with high magnetic 
> noise such as dental work and/or brain surgery contamination. We wanted 
> to remove the signal that comes from these areas. Do you work with such 
> problems?
> 
> Thanks,
> Inna
> 
> On Tue, Oct 30, 2012 at 5:07 AM, "Jörn M. Horschig" 
> <jm.horschig at donders.ru.nl <mailto:jm.horschig at donders.ru.nl>> wrote:
> 
>     Dear Inna,
> 
>     I'm not aware of any implementation in FieldTrip. For the CTF system
>     we got the ft_denoise_synthetic function, but afaik SSS is something
>     NeuroMag specific and (I might be wrong here, because...) since we
>     do not have a NeuroMag system I would guess that no one bothered to
>     implement it. If you want to do so, you're welcome and we would be
>     most happy to help out on various ends with all our abilities ;)
> 
>     Best,
>     Jörn
> 
> 
>     On 10/25/2012 8:33 PM, McGowin, Inna wrote:
>>     Hello,
>>     I would like to know if Signal Space Separation method for MEG
>>     data analysis is available in the FieldTrip toolbox.
>>
>>     Thanks,
>>
>>     -- 
>>     Inna
>>
>>
>>
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> 
> 
>     -- 
>     Jörn M. Horschig
>     PhD Student
>     Donders Institute for Brain, Cognition and Behaviour 
>     Centre for Cognitive Neuroimaging
>     Radboud University Nijmegen 
>     Neuronal Oscillations Group
>     FieldTrip Development Team
> 
>     P.O. Box 9101
>     NL-6500 HB Nijmegen
>     The Netherlands
> 
>     Contact:
>     E-Mail: jm.horschig at donders.ru.nl <mailto:jm.horschig at donders.ru.nl>
>     Tel:    +31-(0)24-36-68493 <tel:%2B31-%280%2924-36-68493>
>     Web: http://www.ru.nl/donders
> 
>     Visiting address:
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> 
> 
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> 
> 
> 
> 
> -- 
> Inna McGowin
> 
> 
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