1. Department of Electronics, Information and Bioengineering (DEIB) Politecnico di Milano University 20133 Milan Italy
2. Department of Biomedical Physics in Radiation Oncology German Cancer Research Center 69120 HeidelbergGermany
3. Department of Medical Physics Ludwig‐Maximilians‐Universität München 85748 Garching Germany
4. Radiation Physics University of Wollongong Wollongong NSW 2522 Australia
5. Department of Basic Sciences Loma Linda University Loma Linda CA 92350 USA
6. Center for Research Computing and Data Northern Illinois University DeKalb IL 60115 USA
7. Department of Physics Northern Illinois University DeKalb IL 60115 USA