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Fast Filtered Backprojection<br />
• “Feldkamp with a twist”<br />
• Horizont<strong>al</strong> ramp filter<br />
• Backproject entire projection without weighting<br />
factors<br />
• Correct geom<strong>et</strong>ry backprojects<br />
edges to correct location<br />
• Maxim<strong>al</strong> inconsistency when<br />
geom<strong>et</strong>ry is incorrect<br />
v [mm]<br />
−150<br />
−100<br />
−50<br />
0<br />
50<br />
100<br />
150<br />
−200 −150 −100 −50 0<br />
u [mm]<br />
50 100 150 200
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