Advanced Skills in Modern Radiotherapy 2018
3D (CBCT)
• Limitations ➢ Collision ➢
Field of view
➢
Increased dose to contra lateral breast
• CBCT not acquired at the isocentre to avoid collision
• Then once matched the shift includes the offset from isocentre position
• Adds time and potential errors
• Donovan et al. (2012) stipulate limitations on iso position to account for this
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