I would recommend that in your area, you would work on a research paper/project that concentrates on a dilemma in that field and it is a big problem or question for other doctors and researchers in that area.
This will improve recognition from other doctors/researchers in your topic. It may also gain you many citations if you find that helpful.
Impact. This seems to be the most important factor. The topic should be one that answers interesting questions of concern to people in the field and the vehicle (journal) should also be one that has a wide readability.