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. 2011 Jul;40(5):265–273. doi: 10.1259/dmfr/30642039

Figure 5.

Figure 5

One source of undersampling resulting in aliasing errors in cone beam CT (CBCT) is the cone divergence itself. Obviously, the slice A of the volume nearest to the source s collects many more “rays” per voxel (as measured on the detector pixels, p) than slice B, which is closest to the detector. The number of rays per voxel linearly decreases with the distance of the slice from the source s