High resolution
IGXT/gating
Multileaf
collimator
First Linac
Computerized 3D CT
treatment planning
1960 1970
1980
1990
2000
2010
IMXT
dose-painting
Standar
d
collimat
or
Cerrobe
nd
blocks
Shaped
electron
fields
Imag
e
Fusio
n
Robotic XT/tracking
Technological progress since 1970s