How to find similar areas in two images using openCv?

Question

OpenCV

Is the openCv library suitable for searching two different images for the same zones?
The task is to analyze X-ray images of the skull taken at intervals of 0.5-1 year.
The human skull develops and changes over time (the bones of the skull grow). But there are places in the bones that do not change. I need a program that itself would find these places, points and bones.
Input data: x-ray of the skull of one patient, taken at different times with a period of 6 months to a year.
It is necessary to find the same areas (those that have not changed) in the images
Desired accuracy 0.35 mm