[Simnibs-discuss] creating rTMS e-field model with a known MNI coordinate

Axel Thielscher axelt at drcmr.dk
Tue May 4 09:52:18 CEST 2021


in the graphical user interface, you can only define coil positions on 
the skin surface. You do not define target positions in the brain, but 
just where the coil is localed on the head. If you want to get a coil 
position that is optimal to target a specific brain region, please have 
a look at the ADM optimization approach.



On 4/28/2021 5:52 AM, Fryer, Susanna wrote:
> Hello,
> We are trying to model a TMS target that is in deep medial prefrontal 
> cortex/dorsal ACC, but are having trouble understanding how to 
> navigate to our desired target, which we have defined in MNI.
> We are able to create models at the surface, but can't seem to 
> navigate the software to go into cortex.
> Specifically, how do we convert our MNI coordinate to the coordinate 
> system that SIMnibs is using (and what coordinate system is it that 
> SIMnibs uses?).  How do we target below the surface?
> Thank you so much for guidance!
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Dr. Axel Thielscher
Associate Professor
Danish Research Center for Magnetic Resonance
Copenhagen University Hospital Hvidovre
DK-2650 Hvidovre, Denmark
Department of Health Technology
Technical University of Denmark
DK-2800 Kgs. Lyngby

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