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Fig. 6B —35-year-old man with osteosarcoma of left thigh. Coronal oblique CT, PET, coregistered PET/CT, and CT attenuation maximum-intensity-projection images from left to right, respectively. Patient was unable to extend leg and this resulted in truncation artifact. Before truncation correction (A), maximum standard uptake value (SUV) of tumor in truncated region (arrow, A) was 3.37, and after truncation correction (B), maximum SUV was 12.74 (arrow, B)—an increase of 278%.