Physics Bucharest 2017

(dis)advantages of on-line and NAL

Both protocols: in first fraction, detection of gross errors/mistakes

On-line protocol - daily correction of full error (random + systematic components) - maximal reduction of PTV margin - if not automated: unacceptable increase of treatment time, large workload NAL protocol - no image analysis at treatment unit, no increased fraction duration - imaging only f  3, image analysis workload low - significant (but partial) reduction of systematic errors and hence PTV margin (  res   /  N) - no reduction of random errors