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Fig. 9 | BMC Medical Imaging

Fig. 9

From: A sinogram denoising algorithm for low-dose computed tomography

Fig. 9

Left: the ROI used to compute the noise level and spatial resolution in the reconstructed images of the rat; the noise level was computed as the standard deviation of voxel values in the cube C and the spatial resolution was computed as the maximum gradient along the line L. Right: plots of noise level versus spatial resolution for the three denoising algorithms. The dashed horizontal and vertical lines in this plot show the corresponding values for the image reconstructed without sinogram denoising

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