Figure 5.

Local parameter estimates obtained from combining the four simulations of waves in homogeneous material are shown for the xy-planes of 13, 25, 31, and 44. An estimation kernel with a radius of 5 voxels is used for all three estimation methods. The outlining box indicates the full extents of the material (50 nm × 50 nm). The outer 4 voxels have been removed from the estimates leaving a smaller shaded region (42 nm × 42 nm) of local parameter estimates. Color bars show a range for each material parameter from a minimum value of zero to a maximum value of 150% of the known values of μ = 1000 Pa, ϕ = 1, ζ = 2, and η = 0.2. Estimates from the DFI-LFE method for (a) μ, (b) ϕ, and (c) ζ are shown in the top row. Estimates from the DFI-LDI method for (e) μ, (f) ϕ, (g) ζ, and (h) η are shown in the second row. Estimates from the Curl method (with kernel approach) for (i) μ, (j) ϕ, (k) ζ, and (l) η are shown in the third row.