1 Department of Physics and Computational Radiology, Division of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway. mokvas@ous-hf.no.
2 Faculty of Medicine, University of Oslo, Oslo, Norway. mokvas@ous-hf.no.
3 Faculty of Medicine, University of Oslo, Oslo, Norway.
4 Department of Nuclear Medicine, Division of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway.
5 Department of Physics and Computational Radiology, Division of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway.
6 Department of Physics, University of Oslo, Oslo, Norway.