IMRT

IMRT vs VMAT vs TOMO: organs at risk

Bertelsen Acta Oncol 2012

15 pts

IMRT VMAT Difference V5% 51.8 (34.1-70) 50.3 (27.6-71.5) 1.5; p=0.3 V20% 21.6 (9-28) 20.4 (7-27) 1.3; p=0.01 MLD 13.1 (7-18) 12.8 (6-18) 0.3; p=0.1 NTCP 5.7 (3-8) 5.4 (2-8) 0.3; p=0.01 Only modest differences

Quan IJRBOP 2012

16 pts

VMAT vs IMRT: Lower MLD 8%

Lower Mean Heart Dose 17% Lower esophagous V70 24%