Head-to-head comparison of image quality between brain 18F-FDG images recorded with a fully digital versus a last-generation analog PET camera
J Salvadori, L Imbert, M Perrin, G Karcher, Z Lamiral… - EJNMMI research, 2019 - Springer
EJNMMI research, 2019•Springer
Background The quality of phantom images was previously shown to be higher on digital
(Vereos Philips®) compared to analog PET (Ingenuity Philips®) cameras. This study aimed
to determine the extent to which this difference still remains significant on normal brain 18 F-
FDG PET images. Methods Relative noise and contrast as well as border sharpness (a
spatial resolution index) of central (striata) and peripheral (occiput) gray-matter structures
were compared between 10 sets of normal brain 18 F-FDG PET images recorded and …
(Vereos Philips®) compared to analog PET (Ingenuity Philips®) cameras. This study aimed
to determine the extent to which this difference still remains significant on normal brain 18 F-
FDG PET images. Methods Relative noise and contrast as well as border sharpness (a
spatial resolution index) of central (striata) and peripheral (occiput) gray-matter structures
were compared between 10 sets of normal brain 18 F-FDG PET images recorded and …
Background
The quality of phantom images was previously shown to be higher on digital (Vereos Philips®) compared to analog PET (Ingenuity Philips®) cameras. This study aimed to determine the extent to which this difference still remains significant on normal brain 18F-FDG PET images.
Methods
Relative noise and contrast as well as border sharpness (a spatial resolution index) of central (striata) and peripheral (occiput) gray-matter structures were compared between 10 sets of normal brain 18F-FDG PET images recorded and reconstructed on digital and analog last-generation PET cameras, together with a subjective visual analysis of image quality provided by experienced physicians.
Results
Compared with analog PET, digital PET provided marked improvements in image quality parameters. The median relative noise was decreased (− 22%), while gray/white-matter contrast was increased (+ 27%/+ 41% for central/peripheral gray-matter structures), with these results being consistent with visual analysis. In addition, a clear enhancement in image sharpness was further documented for digital PET owing to the possible use of a 1-mm3 voxel size (+ 24%/+ 21%).
Conclusions
On normal brain 18F-FDG images and compared with a last-generation analog PET, the fully digital PET camera offers marked improvements in image noise and contrast, as well as significant potential for further enhancing spatial resolution.
Springer
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