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Why Is
Accuracy
So Important?
•
OAR delineation has significant impact on dose calculation and
plan quality in dosimetry
•
IMRT and VMAT are inverse planning techniques and as such
are driven by volumes
➢
Target and OAR relationship
•
Accurate imaging ensures:
➢
Decrease in interobserver variability
➢
DVH calculation
➢
Greater confidence in predicting toxicity
➢
“reduction in inter- and intra-observer variability and therefore
unambiguous reporting of possible dose-volume effect relationships”
(van der Water, 2009)