How to show all coronaries of 3D CTA in a 2D image, using multi-planner reformation technology? I see the "curved planner reformat "module just straighten the volume.
If you want to see a vessel tree, not just a specific branch then you need to use 3D view (this 3D rendering appears on a desktop screen as a 2D image - as everything else on a 2D screen).
You can also generate maximum-minimum intensity projection (MIP) image so that you can display this 3D data in a slice view (see script here), but it is not that helpful, because you cannot make distance measurements anyway.
Do you have an example image that you would like to get in Slicer?
What is your overall goal?