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Direct aperture optimisation (DAO)
Leaf positions and segment weights are optimised directly
Not optimising ‘ideal’ modulation
Resulting plan is deliverable
May be more efficient in MU
No degradation of ‘optimised’ plan
Initial segmentation may be based on
Beam’s eye view (BEV) of target
Segmentation of initial ‘ideal’ optimisation
e.g. Pinnacle Direct Machine Parameter Optimisation (DMPO)
Reference: Shepard et al, Med Phys 29 (6): 1007-1018, 2002