1. Department of Radiology, Virchow-Klinikum, Medical Faculty, Humboldt University, Berlin, Germany
2. Department of Radiology, Medical Academy Wroclaw, Poland;
3. DeTeBerkom, Research in Telecommunications Ltd, Berlin, Germany
4. Department of Cardiology, Virchow-Klinikum, Medical Faculty, Humboldt University, Berlin, Germany