Radiobiology is a very diverse field, and you can focus on several subjects.
If you are considering developing your studies in Radiobiology, there are some specialized pos-grad programmes that could interest you.
PhD Program from Lisbon’s Nova University, in Portugal
https://www.fct.unl.pt/en/education/course/phd-radiation-biology-and-biophysics
Master programs:
Oxford University
https://www.ox.ac.uk/admissions/graduate/courses/msc-radiation-biology?wssl=1
Technical University of Munich
https://www.med.tum.de/en/master-program-radiation-biology
Other training courses:
Stockholm University’s course (next edition, April 2020)
http://www.concert-h2020.eu/en/Events/CSC_2020_CELOD
Radiobiology training course at SCK-CEN, in Mol, Belgium
https://academy.sckcen.be/en/Customised_trainings/Course_topics/Radiobiology
If you need any help or advice, I’m happy to give you my input.
RadBio 