IMRT

3D vs IMRT: PTV

Murshed IJROBP 2004 (sliding window) Liu IJROBP 2004 (sliding window)

41 pts PTV: 623cc (75-1645)

Conformity Index 3D vs IMRT: 1.54 vs 1.41 (p<0.01)

(IMRT benefit ≈

21%)

IMRT

10 pts PTV: 403 (65- 762)

3D IMRT

benefit: CI min 1.33 vs 1.07 20% CI max 4.53 vs 2.09 54% CI med 2.35 vs 1.37 42% p=0.012 PTV90/V20 IMRT benefit ≈ 25% (12-36%); 50% IMRT non planar or 9 fields

Christian IJROBP 2007 (step and shoot)

10 pts PTV 197 (103- 271 cc)