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. Author manuscript; available in PMC: 2014 Nov 7.
Published in final edited form as: Phys Med Biol. 2013 Oct 10;58(21):10.1088/0031-9155/58/21/7563. doi: 10.1088/0031-9155/58/21/7563

Figure 6.

Figure 6

Qualitative comparison of various reconstruction methods at different levels of incident x-ray fluence (I0, with units photons / pixel). All reconstructions used a highly sparse data acquisition of 20 projections over 200° except for the filtered-backprojection case in the top row, which used 360 projections over 360°. Zoomed images of the nodule are shown for each case. The region-of-interest used for local RMSE computation in proximity to the nodule is shown as a white circle in the upper right image.