CPB Ljubljana 2018 course book

CONFORMITY PARAMETERS

- CONFORMAL INDEX: COIN

- COVERAGE INDEX: CI

Fraction of the target volume receiving a dose equal or greater than the reference dose (100%) CI = V 100 /100

How well fits the 3D shape of D ref the target volume PTV

Body contour

PTV

PTV

ref

Reference isodose V ref

COIN = c 1

x c

2

C.I. is variable, depending on the shape of the target / PTV

PTV

V PTV

ref

ref

c



2 c 

1

PTV

ref

Baltas D, Kolotas C et al. Int J Rad Oncol Biol Phys 40, 512-524, 1998

Courtesy of Dimos Baltas