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Table 4 Simulation—smoothing kernel FWHM: mean values and (standard deviation)

From: Masked smoothing using separable kernels for CT perfusion images

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)

  1. 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.
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BMC Medical Imaging

ISSN: 1471-2342

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