Here is a recent thread with some information. There are many more in this forum.
Suggest that you call & get the written report of your X Ray and MRI imaging. Usually a specialist at the imaging lab will write the report and send a copy to your Dr. The MRI has a check list of all the knee structures with any observed conditions. For example, 'A is normal, B is torn, C shows arthritic deterioration, D has a grade II tear,......', etc. Study the anatomy of the knee and research all the mentioned terms and conditions. One X Ray of the knee is positioned to show cartilage spacing, the cartilage thickness can be an indication of the degree of arthritis. Discuss with your Dr.
Find a well qualified Dr & quality hospital even if located at some distance.