How can I make a plane from 3 midsagittal fiducials?

[lassoan (Andras Lasso)]

You might also find ACPC Transform module useful, which can reorient an image to make the midsagittal plane exactly aligned with the sagittal view.

Short demo/tutorial video:

ACPC Transform for MRI scans- Slicer 4.11

I did a quick recording of how ACPC alignment works in latest Slicer Preview Release: [acpcdemo] It would be great if you could create a nice description/tutorial of how to use it (with a few screenshots). Slicer documentation is now in markdown format, which is the format that this forum uses, so you can write this as a new post in this topic and I will move it to the Slicer documentation when it is ready.

Documentation:

https://www.slicer.org/wiki/Documentation/Nightly/Modules/ACPCTransform