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Medical linac full beam line

Electron Gun

Accelerator

Target

Primary

collimator

Jaws (X,Y)

MLC

Flattening

filter

What parts of the beam line should

move to create a moving beam?

Dynamics of breathing/tracking:

-Frequencies up to 30 Hz

-Amplitudes of a few centimeters

-Sub-millimeter accuracy

Too heavy !!! (>>1000kg)

Tumor tracking

“Move only certain parts of the

beam line?”

“Loose some of that weight?”

SBRT 2017 - D. Verellen