IMRT 2018

Dosimetry for 3D conformal planning

Gantry

3D conformal treatment planning: open fields Dosimetry for 3D conformal is influenced by • Depth dose • Profile • Output factors (OF)

y/x

4

10

20

40

4

0.922 0.950 0.957 0.959

10

0.958 1.000 1.014 1.021

20

0.974 1.024 1.045 1.057

40

0.983 1.038 1.067 1.085