Dose Course Book

Conclusions: measurement vs calculation in solid phantoms

•It is important to understand how the TPS handles different materials and reports dose.

•We have been working on the assumption that homogeneous solid phantoms which are shown to be

water-equivalent for reference dosimetry and relevant dosimetry using an ionization chamber are also

water-equivalent under a multiple beam arrangements (for the verification of treatment plans).

•The water-equivalence of complex phantoms with embedded detector systems (not necessarily ionization

chambers) and their comparison TPS calculations in these phantoms is an area where more investigations

are needed.

Does what I

see agree

with

calculations?

Are we

comparing

the same

thing?