Dose 2016

Phantoms for beam characterization: solid plastics

Disadvantages

Advantages

• Water-equivalence depends on modality and energy (MV, kV, MeV) • Expensive if manufactured to be water- equivalent • Different samples of same type of plastic could vary in composition and from manufacturer specification

Robust

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• Allow easy, quick and reproduceable setup

• Can be used with non water-proof detectors

Easier to use with films

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Possible degradation with time

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Possible charge storage effects

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