hello and welcome to healthcare magic.
These MRI signs could indicate Degenerative joint disease
of your right knee could be osteoarthritis
. your age would help in being more informative.
I would suggest you consult an orthopaedician with the mri findings and since there is a cyst in your tibia
and more than 50% loss of patellar cartilage
thickness he would be a better judge of requirement of a surgery.