IMRT
Goal of dynamic tracking as compared to the ITV approach
DRIFT
2) Real-time adaptation of periodic breathing motion and systematic drifts in patients with a variable and unpredictable magnitude of motion ( lower lobe tumors and patients with poor pulmonary function*)
*Guckenberger et al, IJROBP 2007
3) Increased efficiency of respiratory correlated treatments (as compared to gating)
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