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Table 3 Simulation—vessel width: mean values and (standard deviation)

From: Masked smoothing using separable kernels for CT perfusion images

Method\Vessel diameter

1

2

3 mm

Noise – No smoothing

51.2 (26.0)

50.2 (24.5)

48.5 (25.5)

Simple smoothing

61.3 (1.6)

66.5 (1.7)

68.6 (1.6)

Removed smoothing

38.8 (1.4)

33.6 (1.4)

31.6 (1.3)

Masked smoothing

50.0 (1.8)

50.1 (2.0)

50.1 (2.1)

  1. Masked Smoothing is much closer to the true value of 50 than either of the other smoothing methods. The standard deviation values are markedly better for all smoothing methods than the No Smoothing data. A clear bias is evident for the Simple and Removed Smoothing methods.
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BMC Medical Imaging

ISSN: 1471-2342

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