Physics Bucharest 2017

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