G Landry1 *, F DeBlois2 , M Bazalova3 , F Verhaegen14 , (1) Medical Physics Unit, McGill University, Montreal, QC, CA, (2) SMBD Jewish General Hospital, Montreal, QC, CA, (3) Stanford University School of Medicine, Stanford, CA, US (4) Department of Radiation Oncology (MAASTRO), GROW, University Hospital Maastricht, Maastricht, the Netherlands