Slide 1

Planning constraints

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For an uncommon (challenging) case, there may be no experience

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Objective

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If set too low allows computer (planner) to accept plan

less good than is really possible

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If set too high then effectively fail to guide the plan

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Constraint

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If set too low, then drives the plan away from optimal

solution

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If this is a normal tissue constraint then typically drives

down dose in PTV

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If too high then may not protect normal tissue