Brain 17 Vienna

Previous Page

Next Page

Page Background

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%

normal tissue volume

(brain/ROIs) irradiated to Dx (DVH)

V

Rx

- volume covered by prescription isodose

V

PTV

- PTV volume

V

PTV,Rx

- overlapping volume

D

max

- maximum dose at the PTV

D

Rx

- prescription dose in the PTV