Figure 3From: Non-isotropic noise correlation in PET data reconstructed by FBP but not by OSEM demonstrated using auto-correlation functionResults of the cylindrical NEMA phantom study. 2D image (upper left) and 3D image (upper right) reconstructed using OSEM with applied 6 mm (FWHM) Gaussian filter. Corresponding ACF images of 2D (lower left) and 3D image (lower right).Back to article page