L0_2016_Athens_Physics_Programme

Measurement and action protocol

EPID dosimetry results from NKI*

- based on 5547 patients (16986 fractions)

- Isocenter difference <5%

- Gamma pass rate >70%

NKI experience is ~90% of patients will be within criteria

ICRU 83:

5 % was the original ICRU requirement for accuracy of delivery at the ICRU

Reference Point (ICRU, 1993).

For high-gradient (>20 %/cm) regions, the accuracy of DTA should be 3.5 mm.

In the future, the recommended accuracy criteria might be made more stringent

*Reference: I Olaciregui_Ruiz et all Radiotherapy and Oncology 2011

8/31/16