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Warsaw 2017
Need Accurate DVH’s…..
• Various metrics calculated from DVH
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Calculation of biological indices
• Used to correlate local control
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Clinical Trial outcome analysis
• Used to report dose homogeneity
• IMRT Optimisation (Dose Volume Constraints)
• Used to correlate with morbidity for OAR’s
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Clinical decisions are based on these
• Used to develop dose constraints for prospective treatment
planning
• Move from passing rates to DVH based QA metrics?
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Accuracy in DVH construction essential
– Need dose calculation to compute dose in small fields,
inhomogeneous tissue, non-equilibrium regions
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‘Use of dose volume reporting is dependent on
accurate dose calculation algorithms’ (ICRU83)