SBRT 2016

How to Add Various Error Contributions?

 For a simple criteria as a probability level of the minimum dose the systematic error and random error are added linearly

 For various systematic errors and various random errors the errors (SDs) should be added in quadrature :

2 a

2 b

2

Σ+Σ+Σ=Σ c



2

2

2

)10(9.10 3 3 10

= + + =Σ

Emphasis on large errors!