PowerPoint Presentation

Uncertainty requirements for single source

dosimetry

In their methodological recommendations for measuring dosimetry parameters:

➢

TG-43U1

advises on using a dosimeter system with sufficient precision and

accuracy to permit dose-rate estimations with

combined 1σ Type A uncertainty <5%

and 1σ Type B uncertainty <7% for a total 1 σ uncertainty <9% for LE sources

➢

Joint AAPM-ESTRO report

advises on using a dosimeter system with sufficient

precision and accuracy to permit dose-rate estimations with

k=1 Type A (statistical)

uncertainties 3% and k=1 Type B uncertainties 6%

* Rivard et al., 2004. Update of AAPM Task Group No. 43 Report: A revised AAPM protocol for

brachytherapy dose calculations. Med. Phys. 31(3), p.633.

** Perez-Calatayud et al., 2012. Dose calculation for photon-emitting brachytherapy sources

with average energy higher than 50 keV: report of the AAPM and ESTRO. Med. Phys. 39(5),

p.2904