1. Department of Clinical Medicine Aarhus University Aarhus Denmark
2. Department of Oncology Aarhus University Hospital Aarhus N Denmark
3. Photon Dosimetry Laboratory Czech Metrology Institute Prague Czech Republic
4. Division for Ionizing Radiation, WG 6.34 “Dosimetry for Brachytherapy and Beta Radiation Protection” Physicalisch‐Technische Bundesanstalt (PTB) Braunschweig Germany