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Functional imaging to assist volume definition
Considerations
• Disease sites subject to significant respiratory motion can introduce
uncertainty and artefact.
• SUV may be underestimated or the volume over-estimated
• motion mitigation strategies should be considered particularly for
thoracic tumours as they are in radiotherapy
• Quantitative analysis of the SUV is also subject to a number of other
potential errors
• extravasation or incomplete injection,
• longer uptake period
• patient’s blood glucose in circumstances where
18
FDG-PET is
used