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The images for the stadium-shaped phantom after B45 reconstruction (top left), bilateral filtering followed by B45 reconstruction (top center), and B20 reconstruction (top right). The bottom row shows zoomed versions of the central region of the images. The standard deviations inside the ROI are 49.1, 31.9, and 32.9 HU, respectively. The lower contrast plates are, in our opinion, better visualized with the denoised image than with the B20f image.
