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Level 1. Why is it not adequate today?
-The absorbed dose distribution for IMRT can be less
homogeneous then in CRT
-Each beam can produce absorbed dose with large
dose gradients
- Large dose gradients (10%/mm) in the PTV boundary i.e. small shifts in delivery
can affect the reliability of using a single point to report the dose
- Because modern TPS have evaluation tools that makes it possible.
- Monte Carlo calculations have statistical fluctuation in the results for small
volumes which makes it difficult and uncertain to determine an absorbed dose to a
point.
Dose in ICRU83