Radiation protection is an important task for nuclear medicine departmentswith regard to the use of radiopharmaceuticals for diagnostic and therapeuticpurposes. It is important to make sure that the radiation dose to the patients aswell as to staff members is kept “as low as reasonable achievable” (ALARA). Inthe last few years, the use of PET substances with higher photon energy than thepreviously used radionuclides has been more and more common, and the numberof PET radionuclides is ...