ATP 2016

What about second cancer risk?

VMAT and multibeam-IMRT vs. 3D-CRT and forward-IMRT: • More beams  larger volume of normal tissue is exposed to a ‘low-dose-bath’ • Require a longer beam-on time  integral dose can increase because of head leakage and collimator scatter

• Second cancer risk can increase however, absolute risk on second cancer risk is low

Abo Madyan RO 2014, Ibrahim BMC Cancer 2012, Boyce NEJM 2002