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FIGURE 1. (A) Limited coronal view of WB FDG PET/CT study with severe misalignment (arrows) in area of head and neck. (B and C) PET image after CT-based attenuation correction (B) demonstrates biased FDG uptake (arrow), which appears normal on uncorrected PET image (C). (D) Fused CT and uncorrected PET illustrate magnitude of misalignment.





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