SBRT 2016

Effective Standard Deviation of the Errors

 Effective Systematic Error

Error in estimating the average

1 σ N

2

2

+Σ= Σ

effective

 Effective Random Error

2 1 1 σ

  

   − =

σ

effective

N

de Boer H C and Heijmen B J 2001 A protocol for the reduction of systematic patient setup errors with minimal portal imaging workload Int. J. Radiat. Oncol. Biol. Phys. 50 1350–65