1. Department of Cardiology, Turku Heart Centre, Turku University Hospital, Turku, 20521 Finland
2. Department of Radiology, Turku University Hospital, Turku, 20521 Finland
3. Department of Medical Physics, Turku University Hospital, Turku, 20521 Finland
4. Department of Radiology, Central Hospital of Northern Karelia, Joensuu, 80210 Finland
5. STUK - Radiation and Nuclear Safety Authority, Helsinki, 00880 Finland
6. Department of Radiology, Imaging Centre, Kuopio University Hospital, Kuopio, 70210 Finland
7. Department of Medical Imaging, Central Finland Health Care District, Jyväskylä, 40620 Finland
8. Division of Cardiology, Department of Internal Medicine, Oulu University Hospital, Oulu, 90220 Finland
9. Cardiology division, Heart and lung center, Helsinki University Hospital, Helsinki, 00029 Finland
10. Department of Cardiology, Heart Hospital, Tampere University Hospital, Tampere, Finland and Faculty of Medicine and Life Sciences, University of Tampere, Tampere, 33520 Finland
11. Institute of Biomedicine, University of Turku, Turku, 20521 Finland