Physics Bucharest 2017

Motion control (extracranial)

 Breathing, digestion…

Seppenwoolde et al. IJROBP 2002

 Strategies to account for this motion:

Modify respiration/ adaptive interaction Active Breathing Control (ABC) Breath hold Gating Tracking

planning & treatment

Adequate expansion of PTV

4D-CT: ITV, MidV, MidP…

planning

Features of SABR

 Consider fiducials, e.g. liver

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