1. Department of Radiology, Mayo Clinic, Rochester, MN, USA;
2. Department of Medical Physics, Aarhus University Hospital, Aarhus, Denmark;
3. Siemens Healthineers, Forchheim, Germany;
4. Department of Radiation Oncology, Mayo Clinic, Rochester, MN, USA;
5. Siemens Healthineers, Malvern, PA, USA