1. The Medical Imaging Centre of Southwest Finland, Turku University Hospital, Turku, Finland;
2. Division of Digestive Surgery and Urology, Turku University Hospital, Turku, Finland;
3. Department of Surgery, University of Turku, Turku, Finland;
4. School of Health and Social Care, Oulu University of Applied Sciences, Oulu, Finland;
5. Research Unit of Medical Imaging, Physics and Technology, University of Oulu, Oulu, Finland;
6. Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland;
7. Medical Research Center Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland