An Improved Extrapolation Scheme for Truncated CT Data Using 2D Fourier-Based Helgason-Ludwig Consistency Conditions

<div>Flowchart of the proposed sinogram completion scheme: Set up an ellipse model for sinogram completion and optimize the model parameters (here the two ellipse radii) by enforcing the Fourier constraints.</div>

International Journal of Biomedical Imaging

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Figure 2: An Improved Extrapolation Scheme for Truncated CT Data Using 2D Fourier-Based Helgason-Ludwig Consistency Conditions 