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MV CT: Characteristics
Fan beam:
“de-tuned” treatment
beam from 6MV to
3.5MV
Lowered dose rate:
from 899 cGy/min to 11
cGy/min
Xe-detectors
(640 channels)
24
ESTRO IGRT 2008
Beam design requires
less filtering
(
no bow tie filter!
)