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Phantoms for TPS verification and plan QA: use of solid plastics
To compare measured doses in
plastic phantoms
against doses calculated by
TPSs, the phantoms needs to be corrected represented in the TPS
HN to relative electron density calibration
If voxels are assigned to water-like media of
varying relative electron density, and only this
material property is used for the calculation dose
(transport of particles and energy deposition),
comparison against measurements in terms of
absorbed dose to water is straightforward
(provided the all necessary perturbation
corrections are considered in the measurement!)
Eclipse