Brain 17 Vienna

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Metrics for high precision RT

Metric

calculation

conformity index

(RTOG)

rCI V

Rx

/ V

PTV

conformity index

(Paddick)

pCI V

2

PTV,Rx

/ V

PTV

x

V

Rx

homogeneity index

HI

D

max

/ D

Rx

gradient index

GI

V

50%

/ V

100%

volumes of normal tissue (brain/ROIs) irradiated to Dx

planning time, treatment time etc.