“How long have you been practicing radiology? At most for residents, three or four years. Rarely is that enough time to build a network in your brain allowing you to look at a film rapidly once and then build a framework for arriving at a final impression of the study.”
IMHO the networks are built surprisingly quickly, but it requires a great deal of humbleness not to rely on them until they become truly reliable after a lot of practice. The difficult thing about this gestalt approach is to correctly define the tipping point where you can start actually trusting it.