1306-1307 / 1601
CNS: single fraction IGRT for brain metastasis
all in cm
systematic errors
squared
randomerrors
squared
delineation
0.13
0.0169
0
organ motion
0
0
0
setup error
0.03
0.0009
0
CBCT accuracy
0.02
0.0004
0
intrafraction motion
0.02
0.0004
total error
0.13
0.02
0.02
0.0004
times 2.5
times 0.7
error margin
0.34
0.01
total error margin
0.35
•Tightest margin achievable in EBRT ever due to very clear outline on MRI