Physics Athens 2016

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