Registration of CT images based on voxel intensity

Hi everyone
I have two DICOM CT images and I want to register them based on voxel intensity (not organ contour) using 3D Slicer software. Can you guide me?

1- Which of the registration algorithms are available in this software?(rigid, affine, DIR (b-spline, demons, …))
2- Which module can I use for this?
Thanks a lot

https://slicer.readthedocs.io/en/latest/user_guide/registration.html