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EJNMMI Physics
Fig. 4 | EJNMMI Physics

Fig. 4

From: Comparison of image quality and spatial resolution between 18F, 68Ga, and 64Cu phantom measurements using a digital Biograph Vision PET/CT

Fig. 4

Radial profile of the normalized activity concentration of spheres filled with 18F-FDG, 68Ga-HCl, or 64Cu-HCl. Radial profile of the ratio of measured and true activity concentration of the smallest sphere (upper row; diameter 10 mm) and largest sphere (lower row; diameter 37 mm) of the NEMA PET body phantom filled with 18F-FDG, 68Ga-HCl, or 64Cu-HCl (from left to right) at a sphere-to-background activity concentration ratio of 8:1 without the simulation of an obese patient (normal weight setup). The solid line represents the least-squares fit of the convolution of the point spread function and the object geometry, analyzed to yield the FWHM. To guide the eye, the dashed lines represent a mean ratio of measured and actual activity concentrations of 1

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