1MR Research Centre, Aarhus University Hospital, Skejby, Aarhus N, Denmark, 2Department of Procurement & Clinical Engineering, Region Midt, Aarhus N, Denmark, 3Department of Obstetrics and Gynecology, Aarhus University Hospital, Skejby, Aarhus N, Denmark, 4Department of Clinical Medicine, Aarhus University, Aarhus N, Denmark, 5Department of Computer Science, Aarhus University, Aarhus N, Denmark