Transform coordinates from moving images space to fixed images space

Dear all,

I have a moving image A and a fixed image B, and what I need is after registration (moving --> fixed), where the coordinates of moving images are transformed to now.

Since the transformation of elastix is 'inverse' (fixed --> moving), especially when calling transformix for the points, what I did is I registered from fixing to moving (B-->A), followed by applying transformix on the points.txt. Is this the correct method?

I would appreciate any feedback on my post.

Cornelia