X-rays (2009)

Here are a sequence of x-rays of my knees that show the degradation in the joint. 

Here's a shot from 2006.
2006_knees
And one from August 2009
2009_Aug_knees
And from an hour before the procedure (9/18/2009)
2009_pre-op_knee

Here are the measurements that were taken of my knee (by ultrasound) before the procedure.

 Cartilage Measurement