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Invasive frame-based stereotactic radiosurgery
Novalis system:
Phantom positioning:
frame-based vs. image-guided
Patient set-up:
frame-based vs. image-guided
Why the difference?
Flex in the ring fixation system
when attached to the couch
Torque due to placement of the
localizer device on the ring
Lamba et al., IJROBP 2009