A good memory is a definite asset. Much is made of exactly what courses to study in school. Again, the ability to speak and write clearly is very important. Many courses can develop skills in these areas. When people looked at common traits of physicians, they found that the ability to defer pleasure was high on the list.
Much sacrifice is involved in becoming a physician.
It had better be something you want to do VERY much. The best way to find out way to find out what a Radiologist does is to ask your teacher or family member to set up a visit for you at a local hospital. There, you can see for yourself what Radiologists do and ask questions any questions you like. When you are in high school, you can consider doing volunteer work at a nearby hospital. It is a nice item to have on your college application.