[FieldTrip] CTF MEG current phantom

[Rojas, Don]

We don't use that phantom, but the 4D MEG phantom is similar in nature. If it is electrically disconnected, then perhaps the mounting of it is coupling in some vibration that is being picked up by your sensors due to some weakly magnetic component to the phantom or phantom mount. Are you certain that the origin of the signal is the phantom?

On Jan 28, 2013, at 10:01 AM, "McGowin, Inna" <mcgoiv0 at wfu.edu> wrote:

> Hello,
> Does anybody use the CTF MEG Current Phantom (with a current dipole inside) in their studies? 
> If yes, is it noise free? I discovered that even when it's empty and disconnected it produces noise at ~ 5, 10 and 10.8 Hz frequencies on the order of 100-300 fT.
> 
> It's made of plastic and suppose to be non-magnetic. 
> Thanks,
> -- 
> Inna 
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