1. Image processing. Mathematics for solving problems of noise suppression, resolution enhancement, non-linear deformations, auto-segmentation, etc. All this including the use of machine learning.
2. Informatics involving ontologies, graph theory, etc.
3. Biophysical modeling. Radiation therapy is a highly rewarding field due to its extremely high degree of precision in determining and managing exposure.
4. Radiation dosimetry. Transport of ionizing radiation by the Monte Carlo method.