Dose 2016

Why water or water-equivalent phantoms

Need to determine absorbed dose in the different tissues in human body

• Water is a good soft tissue equivalent material for high energy photon and electron beams.

Dosimetry for beam characterisation & TPS verification:

• Reference dosimetry: most dosimetry Codes of Practice (CoP) use water as reference medium

• Relative dosimetry: relative depth functions (PDD, TPR), beam profiles, output factors etc. are measured in water