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Fig. 2. —PET lesions obscured by artifact: Restaging PET/CT in patient
with history of squamous cell carcinoma of the right posterior oropharynx and
right neck who underwent right modified neck dissection and radiation therapy
and now presents with new onset of left-sided throat pain. Focal area of
intense FDG uptake noted on PET would be difficult or impossible to localize
without fusion images due to CT artifact obscuring anatomic detail. Fused
image localizes the PET abnormality to left retromolar trigone area
(arrows).
