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Gantry-mounted kV: Pros and cons
Improved image quality
Low dose
Can acquire images at any
angle
Possibility for volumetric
imaging
Intrafraction monitoring?
Relatively poor soft tissue
contrast (bone / marker
match);
Monoscopic: needs several
angles for 3D positioning
information
Potential collision with
different couch angles (and
very lateral targets?)
Inexact coincidence of kV and
MV isocentre
Intrafraction monitoring?