1. Medical Physicst -- working in Radiation oncology department. Salary in U.S. -- above $100K and could reach $200K, if you work as a solo physicst in a hospital. But you need to get into a M.S. degree program.
2. Dosimetrist, performing treatment planning. You need to get into a one-year training program. The job market is very good in U.S. The salaray is pretty good also.