Figure 5:

(a) Baseline radiograph and (b) corresponding saliency map for a knee in the hold-out testing dataset from a 59 year old female with a KL grade of 0 without pain progression evaluated by the combined model, which made a true negative interpretation of no pain progression. Note that the strong discriminative high activation region on the radiograph on which the model based its interpretation was centered on the joint space and surrounding bone (color region).