IGRT 2016 Madrid

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)

 Beam design requires less filtering ( no bow tie filter! )

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ESTRO IGRT 2008