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Why motion management in IMRT?
•
“Open” beams:
Ø
“Advantage” of photons: dose deposition “tracks” soft tissue
surrounded by lung tissue.
•
Volumetric Modulated Arc Therapy:
Ø
Boost fluence in lung tissue inside PTV
Ø
What if healthy tisue or GTV moves in boosted fluence?
Courtesy M. Guckenberger
Type A
Type B
Inverse
optimization
SBRT 2017 - D. Verellen