An expert is …

I would also add the following quote by Ruggiero Ricci: “A specialist is someone who does everything else worse!” These two quotes make a lot of sense, especially in the context of the ever-more multidisciplinary nature of imaging research, and the effective demise of major funding to those residing in their ivory castles. We need to understand more and more about diverse and related fields to our own field of research, in order to make meaningful and notable contributions, and bring in funding to further fuel this research.