Return volume intensity value from tip of tracked stylus

[banderies (Barrett Anderies)]

Hello all,

I am using a Polaris Vicra and SlicerIGT to track a NDI stylus/pointer, and I would like to return the intensity value from a volume at the tip of the stylus (the StylusTipToStylus transform). I am sure that there is a built in function for this, but have been unable to locate it. I would greatly appreciate it if someone could point me in the right direction.

Thanks and best regards,
Barrett

[lassoan (Andras Lasso)]

These two examples should contain all that you need:

• Observe a transform, get RAS (world) position
• Get voxel value from RAS position

[banderies (Barrett Anderies)]

@lassoan That worked, thanks!