792 / 1138
Where 4D CBCT improves accuracy
ESTRO SBRT Course 2015
36
Lung SBRT using Elekta technology
Variability as
standard deviation
between observers
Variability as
maximum range
between observers
SI
[mm]
SI
[mm]
IG-4D
All observers
0.6
1.8
ROs
0.5
0.9
RTTS
0.4
0.8
IG-ITV
All observers
1.5
3.8
ROs
1.6
3.1
RTTS
1.2
2.2
Sweeney RO 2012
Reduced inter-observer variability using 4D-CBCT
compared to 3D-CBCT