Physics Bucharest 2017

OFF-LINE protocols

- imaging in limited number of fractions (at least first N fractions) - measured errors are only used for correction in future fractions - corrections not used same day  off-line image analysis

in all fractions = patient’s systematic set-up error,

= random error in fraction

 of measured

, only -component is relevant for future fractions

 use measured to estimate  correct in future fractions with estimate of

AIM : reduction of systematic set-up errors