120 / 1544
A moving treatment beam … Gimbaled
Linac
Electron Gun
Accelerator
Target
Primary
collimator
MLC
Flattening
filter
Keeping the MLC/FF =
Still very heavy (700kg)
RF Power
Vero
“
reduced
”
beam line
-Allows rotation of the linac/MLC assembly
around the
“
Center of mass
”
-Only 2 DOF dynamic (
Pan/Tilt rotation
)
-MLC and flattening filter remain
Astronaut training:
“
the gimbals chair
”