Physics Bucharest 2017
6/3/2017
Conformity Index
0 1 2 3 4 5 6 7 8
CI (Knoss et al.) CI (ICRU)
Conformity Index
NOTE: Conformity index is defined differently in different texts: RTOG /ICRU: CI= V treated to specific Iso-dose / V target 0 2 4 6 Volume of Isodose/Volume of PTV
8
The “ specific Iso-dose” is often prescription dose, 95% dose or 50% dose Both definitions CI close to 1 is ideal, provided ALL of PTV is covered. BE careful not to only look at CI, as lack of PTV coverage may lead to CI near 1.
5
Beam shaping and modulating techniques Conventional RT Only Jaws to limit the beam apertures, wedges to modulate the intensity
76. 2315
CI
7.3
%95
3. 626
Bladder Rectum
6
ESTRO physics course 2017
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