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Imaging tumors with [18F]FDG-PET/CT. The upper and lower rows depict images from cell line A549 and H1299, respectively; the left and right columns depict images for non-co-transplanted and co-transplanted tumors, respectively. Left column: lower activity with homogenous pattern of [18F]FDG-activity in non-co-transplanted tumors; right column: in contrast higher activity with heterogeneous pattern of [18F]FDG-activity in co-transplanted tumors
