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Simulation—smoothing kernel FWHM: mean values and (standard deviation)
| Method\kernel FWHM | 1 | 2 | 4 mm |
|---|---|---|---|
| Noise – No smoothing |
51.7 (25.1) |
49.9 (25.9) |
50.0 (24.0) |
| Simple smoothing |
64.6 (4.1) |
66.4 (1.6) |
60.4 (0.6) |
| Removed smoothing |
35.7 (3.6) |
33.6 (1.3) |
39.6 (0.5) |
| Masked smoothing | 50.2 (5.1) | 50.0 (2.0) | 50.0 (0.7) |
Only the Masked Smoothing method had mean values close to the true underlying value of 50. Standard deviation values decreased as the kernel size increased.
