Physics Bucharest 2017

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