What ML algo to choose to recreate x-ray human posture

I have an idea and not sure how to start. I have a x-ray image Of human skull. What kind of ML algorithm whold be the best to recreate the posture of the original skull. How I see the algo steps.

1. Have an image of skull
2. Have an 3d model of skull
3. Arrange the 3d model in space and take an virtual x-ray of it.
4. Compare the real and virtual x-rays and make the adjustments to parameters.

I do not fully understand what ML algo can give adjust the virtual's skull posture based on the error of matched x-rays. Thanks!