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Breathing synchronization
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Requires monitoring respiration (IR markers, spirometers, …)
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Requires correlating external breathing signal with internal
tumor motion
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Requires prediction model to compensate for system latency
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Gating
Ø
Inefficient use of duty cycle: trade-off between minimizing motion in the gate and
beam-on time
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Robust … less depending on predicting model
Ø
Verification during treatment possible
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Tracking
Ø
Efficient use of duty cycle
Ø
Requires accurate prediction model of breathing motion
Ø
Verification during treatment is possible with EPID (VERO)
SBRT 2016 - D. Verellen
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