Physics Bucharest 2017

Interplay – VMAT (+ FFF)

2400MU/min - reduce treatment times – < breathing cycles fast IMRT of a mobile target under free breathing conditions

Dosimetric impact of the interplay effect for lung SBRT with flattening filter-free beams and RapidArc VMAT

interplay effect (no averaging)

Over/Underdosage within the target region during a single fraction, mitigated by using 2 to 3 fractions and 2 arcs per fraction

Ong CL et al, Int J Radiat Oncol Biol Phys. 2013 Jul 15;86(4):743-8