Fig. 2From: Technical note: how to determine the FDG activity for tumour PET imaging that satisfies European guidelinesPhantom PET/CT images. Axial PET (a) and attenuation CT (b) images from the IQ phantom on the scanner bed. The phantom spheres and background were filled with FDG activity (ratio 10:1), and the scan duration was 10 min. The squares illustrate three ROIs in one axial plane that are used to determine the COVBack to article page