given a number of materials, the percentage seems to scale exponentially with the number of channels for larger number of materials. Therefore, in this setup, the addition of only a few channels improves the reconstruction quality considerably. Figure \[fig:Recs\] shows examples of the reconstructions at the corners of the curved plane of Figure \[fig:StandardResults\].

![Pixel error percentage for different number of material-channel combinations.[]{data-label="fig:StandardResults"}](figure7.eps){width="70.00000%"}

[0.3]{} ![Reconstructions for various setups. (a, d) Phantoms used with two and ten materials respectively. (b, e) Reconstructions using one channel. The mislabeled yellow pixels are because the attenuation of the yellow material is very close to zero. (c, f) Reconstructions using ten channels.[]{data-label="fig:Recs"}](figure8.eps "fig:"){width="\textwidth"}

[0.3]{} ![Reconstructions for various setups. (a, d) Phantoms used with two and ten materials respectively. (b, e) Reconstructions using one channel. The mislabeled yellow pixels are because the attenuation of the yellow material is very close to zero. (c, f) Reconstructions using ten channels.[]{data-label="fig:Recs"}](figure9.eps "fig:"){width="\textwidth"}

[0.3]{} ![Reconstructions for various setups. (a, d) Phantoms used with two and ten materials respectively. (b, e) Reconstructions using one channel. The mislabeled yellow pixels are because the attenuation of the yellow material is very close to zero. (c, f) Reconstructions using ten channels.[]{data-label="fig:Recs"}](figure10.eps "fig:"){width="\textwidth"}

[0.3]{} ![Reconstructions 