1. Department of Cardiothoracic and Vascular Surgery, Aarhus University Hospital, Aarhus N, Denmark
2. Department of Clinical Medicine, Aarhus University Hospital, Aarhus N, Denmark
3. Department of Biomedical Engineering, Engineering College of Aarhus, Aarhus C, Denmark
4. The Magnetic Resonance Imaging Research Centre, Aarhus University, Aarhus C, Denmark