Fig. 4From: Opening the black box of machine learning in radiology: can the proximity of annotated cases be a way?Possible instances of location of the current case (CC) in the feature space. a The current case (red triangle) falls into a region crowded with annotated cases (ACs), supposed to be equally classified with high confidence (red circles). b The CC falls into an uninhabited region, which would highlight a lack of training or validation similar cases. c The CC falls into a crowded region, yet with different classifications of ACs (red and orange circles), most likely with relatively low confidenceBack to article page