PO-0809: FFF beams from TrueBeam and Versa HD units: evaluation of the parameters for quality assurance. (April 2016) - Fogliata, A.; Fleckenstein, J.; Schneider, F.; Pachoud, M.; Ghandour, S.; Krauss, H.; Reggiori, G.; Stravato, A.; Lohr, F.; Scorsetti, M.; Cozzi, L.