Dear Valia,
since nobody chimes in, I dare to share our own experience …
There is not too much knowledge in general around the RNS (AFAIK there is only one system approved), so take what I say with a pinch of salt.
People does more or less routinely some concurrent brain stimulation and MEG, just check out the literature e.g. on DBS … and we ourselves do a lot of tES (on!) and MEG combined. In your case most of the noise will come from the bulky electronics device implanted, as a moving metallic piece and electronics noise, more than the stimulation current (since you’ll keep it off) per se.
Our experience with similar things (cochlear implants) is so far positive, with some caveats (the CI has a magnet, so it’s going to saturate few/many channels), with no damage (fingers crossed ...!) to the MEG itself. but obviously I take no responsibility of what you will do with your own MEG.
It’s better if you get in touch with your local Elekta guys and discuss with them how far you can go … and the best practice in these cases is start testing it in a super careful way, like e.g. measuring with RNS in the middle of MSR, then 1m from the helmet, then 50 cm, then barely inside etc. (as we do for most of our crazy tES/CI things), and get some feeling …
My 2 €cents,
Gianpaolo
Dr. Gianpaolo Demarchi
Senior Scientist - MEG Lab Physicist
FB Psychologie - Universität Salzburg
Hellbrunnerstr, 34 5020 Salzburg (A)
Tel: +43 (0) 662 / 8044 - 5135
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> Date: Wed, 26 Oct 2016 14:44:20 +0000
> From: "Gumenyuk, Valentina" <[log in to unmask]>
> Subject: RNS patient in MEG
>
> Dear MEG community,
> We are planning to test epilepsy patient with RNS implant ( turned off for period of recording) in our lab using NEUROMAG Triux system. Please share with us any potential problems related with “harming” the MEG sensors. The patient is planning to be recorded for 1-2 hrs, so the battery of RNS will be inside of the MEG helmet for relatively long period of time and I am not sure about outcomes for the MEG sensors afterwards, is the battery interference for 2 hrs won’t permanently damage sensors of our system?
> Any of your advises are very appreciated.
> Thank you very much,
> Valia
>
>
>
> Valentina Gumenyuk, Ph.D.
> MEG Neuroimaging Center
> Meadowlands Hospital
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> End of MEGCOMMUNITY Digest - 25 Oct 2016 to 26 Oct 2016 (#2016-91)
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