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A phantom material is water-equivalent for dosimetry when it mimics water in
all relevant physical and dosimetric properties in the particular radiation
modality
This means, the material should have:
Same attenuation, scatter and absorption properties as that of water
Water-equivalence of solid phantom materials
I “see” 10nC
in 1min
I “see”
exactly the
same
H
2
O
Could there be a
material that water-
equivalent for the
whole range of beam
modalities used for
radiation therapy?