|Message: Re: Magnetic field with parallel world||Not Logged In (login)|
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It is solely up to how you implement your geometry. As you know, CT data often includes some air area outside of the patient body. If any part of your nozzle overlaps with this air voxels, you may want to consider implementing the nozzle in the parallel world geometry (with real material pointers) so that the nozzle material overwrites air.
Please note that you do not need to duplicate volumes between tracking and parallel worlds. If your nozzle is not at all overlapping with patient CT data, all you need to implement in the parallel world is the gold marker (and may be its surrounding box).
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