[FieldTrip] Magnetic dipole fit vs Equiv. Current dipole fit

Jim McKay jim.mckay at candoosys.com
Wed Feb 25 22:40:23 CET 2015

Hello Fieldtrippers,

I am consulting with the Sandia Labs on development of an atomic 
magnetometer based MEG system prototype. One of the areas I am working 
on is head localization, so I was looking at the code for the realtime 
head localization in Fieldtrip. I was surprised to see that although the 
comments talk about using a magnetic dipole forward solution, it 
actually used the FT dipolefit code which is based on an equivalent 
current dipole, as far as I can tell.

There should be a significant difference in the forward solutions 
between MD and ECD, so how does this work? Or am I just missing something?



Jim McKay
Candoo Systems Inc. - Magnetic field sensors, systems, and site surveys
Tel. 778-840-0361
jim.mckay at candoosys.com

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