Role of 18F-FDG PET/CT in pre and post treatment evaluation in head and neck carcinoma

Figure 1 Dental amalgam artifact obscuring an oral cavity tumor. A: The T2 left lateral oral tongue squamous cell carcinoma (arrow) was obscured by the dental amalgam artifact on contrast-enhanced computed tomography (CT); B: The lesion is better evaluated on the contrast-enhanced T1W; C: Positron emission tomography/CT (PET/CT) images. Information from the PET portion is clearly less affected by streak artifact. However, PET/CT does not add additional information to magnetic resonance imaging in terms of primary oral cavity lesion extent for the majority of cases.