Skip to main content

Table 4 Comparison with manual delineation for eight selected plaque samples

From: Dynamic variations in the ultrasound greyscale median of carotid artery plaques

Plaque sample

Our method

Manual delineation

GSM

Area

GSM

Area

 

mean

s.d.

CV

mean (mm2)

s.d. (mm2)

CV

mean

s.d.

CV

mean (mm2)

s.d. (mm2)

CV

px2

32.3

2.80

8.7%

27.9

1.12

4.0%

28.7

3.88

13.5%

27.5

2.10

7.6%

px4

76.9

2.22

2.9%

11.3

1.05

9.3%

78.1

4.57

5.9%

11.0

2.03

18.4%

px11

70.2

1.27

1.8%

38.0

0.23

0.61%

73.0

3.36

4.6%

37.4

0.40

1.1%

px26

43.4

1.49

3.4%

39.5

0.94

2.4%

45.9

2.27

4.9%

36.9

1.61

4.4%

px21

52.4

2.35

4.5%

22.7

1.09

4.8%

51.3

2.86

5.6%

22.1

1.80

8.1%

px22

67.4

2.15

3.2%

21.5

0.80

3.7%

67.6

3.54

5.2%

21.3

1.75

8.2%

px12

54.0

3.72

6.9%

14.9

0.39

2.6%

52.9

4.47

8.5%

15.0

1.23

8.2%

px5

36.9

4.31

11.7%

22.0

0.96

4.4%

36.0

4.66

13.0%

22.4

1.71

7.7%

Column means

54.2

2.54

5.4%

24.7

0.82

4.0%

54.2

3.70

7.7%

24.2

1.58

8.0%

  1. GSM values are un-normalized and CV is the coefficient of variation (s.d./mean).