Table 3. Approximation error of q-space resampling.
For each of four shells, we show the relative NRMSE of resampled vs. acquired DW images, with respect to the NRMSE of two independent b = 0 acquisitions. Errors are averaged over WM voxels from all DW images in each shell.
b-value (s/mm2) | Relative NRMSE (mean ± standard deviation) |
---|---|
4000 | 0.78 ± 0.073 |
12,000 | 0.83 ± 0.11 |
20,000 | 0.97 ± 0.27 |
40,000 | 3.16 ± 1.58 |