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Conclusions
• A range of IGRT equipment and techniques are available
however, the choice of which to use is dependent on the
frequency of imaging and the type of motion which is to
be measured.
• Superior image quality and greater soft tissue
information can be obtained by using 3D imaging and kV
x-ray.
• kV x-ray imaging, ultrasound, optical and
electromagnetic marker systems can be used to
measure intra-fraction motion.
• Optical techniques assume a correlation between
external features and internal organ motion.
• Increasing number of solutions aiming to use in-room
MR