Table 2.
Simulation—SNR: mean values and (standard deviation)
| Method\SNR | 1 | 2 | 3 (least noise) |
|---|---|---|---|
| Noise – No smoothing |
53.6 (49.0) |
49.9 (27.1) |
50.8 (16.9) |
| Simple smoothing |
66.4 (3.3) |
66.4 (1.6) |
60.4 (1.1) |
| Removed smoothing |
33.6 (2.6) |
33.6 (1.3) |
33.6 (0.8) |
| Masked smoothing | 50.0 (3.9) | 49.9 (1.9) | 50.0 (1.3) |
The standard deviation values were lower for low SNR than for high SNR. Standard deviation values were slightly poorer for the Masked Smoothing method, which is explained by fewer voxels being averaged because non-tissue voxels were excluded.