Does anyone know how to visualize points in IJK coordinates in RAS coordinates?

Once you’ve determined the coordinates of a point in IJK coordinates, how do you visualize it in RAS coordinates? Do we have to do a coordinate transformation first?

RAS are not coordinates but rather orientation.

They can be thought of as a coordinate system in Slicer.

e.g. volume nodes have an IJK-RAS coordinate transformation
and perhaps other things

I’m not sure what “visualize” means here, but if it’s a volume node you can use GetIJKToRASMatrix to go between the two coordinate systems.

Maybe this can help: Script repository — 3D Slicer documentation