[FieldTrip] Signal Space Separation method for MEG data analysis

[Johanna Zumer]

Dear Inna,

Would you mind posting the citation of the reference paper you mention, for
the whole list to benefit?

Cheers,
Johanna

2012/10/31 McGowin, Inna <mcgoiv0 at wfu.edu>

> Tom,
> In theory SSS method allows to extract signal from the dental work (due to
> its magnetization) if correction of motion is implemented. MEG SQUIDS can
> only detect DC magnetic fields if the source is in motion but removing the
> motion from the raw signal with SSS allows to detected DC signals. I have a
> reference paper if you are interested. Thanks
>
>
> On Tue, Oct 30, 2012 at 5:08 PM, Tom Holroyd (NIH/NIMH) [E] <
> tomh at kurage.nimh.nih.gov> wrote:
>
>> 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<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 <jm.horschig at donders.ru.nl>>
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>>>
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>>>
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>>>
>>>
>>>
>>> --
>>> Inna McGowin
>>>
>>>
>>> ------------------------------**------------------------------**
>>> ------------
>>>
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>>
>> --
>> The white knight is talking backwards.
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>
>
>
> --
> Inna McGowin
>
>
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