Microsoft Word - Scientific Program IGRT 2016 Madrid V3

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kV vs MV - Contrast
Energy S
kV MV
“Impact of imaging beam spectrum on image quality”
kV
1 cm 20 cm
50 kV 18.5 %
1.25 MV 1.8 %
2.00 MV 1.4 %
6.00 MV 1.0 %
10-20 times less
8 11/22/11 A. Boyer et al. Med. Phys 1992;19(1)
n n’
nS
kV MV