Direct Fan-Beam Reconstruction Algorithm via Filtered Backprojection for Differential  Phase-Contrast Computed Tomography

<table>Geometrical model for fan-beam DPC-CT data acquisition. <span class="inline" id="M44"></span> is the radius of the source
 trajectory, and <span class="inline" id="M45"></span> is
 source-to-detector distance.</table>

X-Ray Optics and Instrumentation

fig2

Figure 2

Figure 2: Direct Fan-Beam Reconstruction Algorithm via Filtered Backprojection for Differential  Phase-Contrast Computed Tomography 