Don't worry about radiologists. With a aging population and a growing cohort of the "worried well" there is effectively infinite demand for radiology. If the easy parts are automated that just means the total volume of images to be read will increase.
Given the demographic situation in the western world and China, nobody with medical skills will have to worry much about finding employment - I agree.
I wanted attack the "intuitive" point a lot of people make about AI: "The simpler your job, the more easily it will be replaced by a computer". I think this position only focuses on what is technologically feasible, not about the realities of the labor market. There are many people who work for so little, it won't be feasible to try to undercut them on price for a long time. So radiologists are so extremely expensive by comparison that they're a better target for automation solutions.