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Planning constraints
➢
Objectives
▪
What we would
like
to achieve
▪
We should try to meet them
▪
Allow greater dose (or volume) if no alternative
➢
Constraints
▪
What we
must
achieve
▪
These are like a ‘wall’
▪
We must meet them
▪
Absolute limits (e.g. no areas of higher dose)