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Contrast-enhanced CT?
•
PET-CT: low-dose non-contrast CT for:
•
Attenuation correction
•
Anatomical localisation
•
Pros of Contrast:
•
More
findings
(but rarely change management)
•
Improves
abdo/pelvic
disease detection (bowel physiologic uptake)
•
Shows
vascular
compression/ thrombosis
•
RT
planning
•
LN
measurement
for clinical trials
•
Cons:
•
Additional
radiation
•
Resource
implications
•
Small
errors
in FDG measurement in tumours (unlikely to be significant) and
10-15% increase in liver/MBP uptake