Table 2 Quantitative evaluation of inter-, intra-observer variability, method in comparison to each independent observer and final test dataset reported as mean ± standard deviation or median and interquartile range for non-normal distributions.

From: Intracerebral Haemorrhage Segmentation in Non-Contrast CT

 

Inter- observer (n = 5)

Intra- observer (n = 5)

Method vs. observer 1 (n = 5)

Method vs. observer 2 (n = 5)

DSC

0.95 ± 0.02

0.97 ± 0.01

0.91 ± 0.05

0.92 ± 0.05

HD (mm)

6.14 [3.36–22.96]

6.59 [2.92–22.25]

8.03 ± 4.28

13.51 ± 13.29

95% HD (mm)

0.32 ± 0.30

0.00 [0.00–0.45]

1.69 ± 1.81

1.61 ± 1.79

MHD (mm)

0.07 ± 0.04

0.03 ± 0.01

0.26 ± 0.26

0.24 ± 0.23

CMD (mm)

0.28 ± 0.14

0.12 [0.12–0.18]

0.68 ± 0.52

0.57 ± 0.41

AVD (%)

5.49 ± 5.50

2.34 ± 1.92

11.64 ± 11.28

10.57 ± 9.76

  1. Metrics reported are Dice similarity coefficient (DSC), Hausdorff distance (HD), 95 percentile HD (95% HD), modified HD (MHD), contour mean distance (CMD) and absolute volume difference (AVD). p-values were computed with a Wilcoxon signed-rank test between the inter-observer variability and method in comparison to the independent observers for each evaluation measure (columns 3 and 4). * indicates a significantly different result (p < 0.05).
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