1 Department of Radiation Oncology, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.
2 Institute of Radiation Physics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland.
3 Heart and Vessel Department, Service of Cardiology, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland. Electronic address: etienne.pruvot@chuv.ch.