I can assure that there are already an awful lot of PhDs in machine learning and computer vision working on the problem of automatically analyzing medical images, and there's been lots of progress over the last few years. There's a really long way to go, however- it's one of those areas where the problem is a lot harder than it seems.

Working in the field has convinced me that radiologists earn every penny, and that there are good reasons for the lengthy residencies and stringent board exams.