1. Department of Medical Physics in Radiation Oncology German Cancer Research Center (DKFZ) Heidelberg Germany
2. National Center for Radiation Research in Oncology (NCRO) Heidelberg Institute for Radiation Oncology (HIRO) Heidelberg Germany
3. Department of Physics and Astronomy Heidelberg University Heidelberg Germany
4. Department of Radiation Oncology, Heidelberg Ion‐Beam Therapy Centre (HIT) Heidelberg University Hospital Heidelberg Germany
5. Department of Radiation Oncology Heidelberg University Hospital Heidelberg Germany
6. Goethe University Frankfurt Institute of Applied Physics Frankfurt Germany