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Fig. 2 | EJNMMI Research

Fig. 2

From: Head-to-head comparison of image quality between brain 18F-FDG images recorded with a fully digital versus a last-generation analog PET camera

Fig. 2

Schematic representations of methods used on axial 18F-FDG brain PET images to a quantify the contrast between central (striata) or peripheral (occiput) gray-matter structures and a white matter structure (semi-oval center), b determine the sharpness index through the maximal slope of count profiles obtained perpendicularly to the gray/white-matter interfaces of striata and occiput and further normalized to the maximal curve value, and c quantify the noise level within the semi-oval area

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