1711 / 1840
Quality Parameters and Indices
Implant Volume based
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Natural Dose Volume Histogram based Indices
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Uniformity Index UI
•
Quality Index QI
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Natural Dose Ratio NDR
“Natural” Dose Volume Histograms are calculated by most TPSs
Histograms can be inspected for their appearance
Anderson LL
Med Phys 13 (6); 898-903, 1986
Van der Laarse R, Prins TPE
Nucletron International
; 352–372, 1994.
Indices are derived and shown based on these NDVHs