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Treatment plan comparison for an abdominal lesion –
7 coplanar equi-spaced beams versus 5 non-coplanar beams
7 equi-spaced coplanar beams
5 non-coplanar beams
Solid lines: 7 coplanarequi-space d beams
Dashed lines: 5 optimized beams
While non-co-planar beams do offer
improvement in dose distributions,
Delivery times with standard linacs
needs to be considered
Courtesy of Uwe Oelfke
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Experience is gold!
Planning studies are a good way of gaining experience.
Experience can be fed into
“Class solutions”
or automated planning
Beam orientation
Number of beams
Factors Affecting Optimization Results
Optimization algorithm and objective function
Optimization parameter and dose constraints
The inverse problem
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