You can check your local hospital for older records. If they have something similar or exact MRI images, they may give it to you. Or simply, you can get a paper from your university to ask the hospital to give you the scans. Also, back in my bachelor's degree thesis, I analyzed a knee implant attached to the Femur and Tibia bones. There is a website, our tutors suggested to us, but I completely lost its link. I'm sorry about that. It's similar to ResearchGate but for medical only. You can ask medical people who used that site for info. I wish I could help more. I hope this helps more or less.