Step 1: Load MR images and register ZFrame fiducials

First, load MR images in 3DSlicer (drag the provided files and drop at the 3D Slicer interface). Then open “ZFrameRegistrationWithROI” module

ZFrameRegistrationWithROI module

To register the fiducial marker model to the MR image:

Select the horizontal ZFrame model
Select the “COR TSE T2 COVER ZFrame” volume
Select index of slices 9 to 12
Define the ROI in the coronal view (green viewer) that appropriately covers the fiducials
Click the ✓ button

ZFrame registration

Observe the resultant Linear Transform node that was created to represent the transform from ZFrame to Scanner coordinates:

Transform node Transform coordinates