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FIGURE 7. Modelization of geometry of backprojection. (A) With ray-driven backprojection, value attributed to each pixel along path is proportional to line length (l1, l2 ... l5). (B) With pixel-driven backprojection, center of each pixel is projected (dashed lines) and value attributed to each pixel is given by linear interpolation of values of closest bins ({triangleup}).





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