Flipping Book - ATP

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Limits of Feedback Control
 “Adaptive” attempts to correct the mean (accuracy), and
address the variation (precision) with optimal patient-
specific margins.
 “Gating ” and “Tracking” try to control the beam and target
positioning in real-time, with minimal PTV margins.
 What happens when knowledge is out of date?
 What happens when we can’t measure fast enough?
 Delayed evaluation
 inference from sources outside the scope of the intervention?
 Uncertainty! - efforts to control are wasted