1. Universitat Politècnica de Catalunya (UPC) Institut de Tècniques Energètiques, , Barcelona, Spain
2. Universitat Politècnica de Catalunya Research Centre for Biomedical Engineering, , Barcelona, Spain
3. OSEL, CDRH, U.S. Food and Drug Administration Division of Imaging, Diagnostics, and Software Reliability, , Silver Spring, MD, United States
4. St. James’s Hospital Medical Physics and Bioengineering Department, , Dublin, Ireland