2017_IGRT course book

Gantry-mounted kV: Pros and cons

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

Improved image quality

Low dose

Can acquire images at any angle

Possibility for volumetric imaging

Intrafraction monitoring?

Intrafraction monitoring?