IMRT Course 2016

Static gantry, dMLC:

no distant local minima for 'easy' MLCs,

(e.g. sliding window)

proven algorithm for solution

Principles: The optimization problem for the

different IMRT techniques

Static gantry, step&shoot:

local minima possible, but good heuristics for

(‘step&shoot’ IMRT)

avoiding them (MLC sequencer)

ESTRO IMRT course 2016

IMRT optimization: algorithms&cost functions

London April 4th, 2016

-19-

(Notice:

algorithm

converges,

heuristic

produces a result)

Rotational-IMRT:

So many local solutions that it becomes impossible to

the global one, bold heuristics for avoiding

the inevitable: getting trapped in a local minimum.