Figure 4From: 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. Vertical (dash point) and horizontal profile (dash star) through the centre of the ACF image from 2D (upper) and 3D acquisitions (lower) reconstructed using OSEM with 6 mm Gaussian filter.Back to article page