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. Author manuscript; available in PMC: 2015 Nov 7.
Published in final edited form as: Phys Med Biol. 2014 Oct 8;59(21):6445–6466. doi: 10.1088/0031-9155/59/21/6445

Figure 9. Spectral diffusion results by iteration.

Figure 9

Material maps overlaid on a single, 2D slice of the 55 kVp CT data after 0, 1, 2, and 3 iterations of spectral diffusion. “Iteration 3+” indicates the iteration 3 results after the application of subspace projection (Equation 2.27). White arrows indicate a blood vessel affected by subspace projection. The CT data and material maps are scaled as shown in HU (55 kVp data) and mg/mL (material maps).