IMRT 2017

IMRT INVERSE PLANNING OPTIMIZATION: THE IMPORTANCE OF THE OPTIMIZATION ENGINE Beamlet Based Optimization divides a large beam into many small beamlets of the leaf size which intensities are adjusted according to the required planning dose objectives and constraints . Once the optimal fluence map is decided upon there is a further leaf sequencing step. The optimized intensity patterns are decomposed into a series of deliverable MLC shapes made up of a number of basic beamlets with mathematically related intensities.

Beamlet Based Optimization ( 22 segments )

Direct Aperture Optimization ( 12 segments )

82 MLC @ 1 . 0 cm width

160 MLC @ 0 . 5 cm width