Figure 2

Lesion in the Right Lower Lobe was initially indeterminate based on the WB-PET/CT scan (top row - SUVmax = 1.8). The 4D-PET/CT scan (bottom row –SUVmax = 4.8) revealed FDG uptake in the lesion influencing the reporting physician to re-classify the lesion as probably malignant. The blue arrow in the top left hand cell shows how the significant mis-registration between the PET and CT scans is then well corrected on the 4D-PET/CT in the bottom right hand panel.