Table 2 Segmentation performance in the internal test set.

From: Automated rating of Fazekas scale in fluid-attenuated inversion recovery MRI for ischemic stroke or transient ischemic attack using machine learning

 

Fazekas scale

0 (n = 43)

1 (n = 36)

2 (n = 48)

3 (n = 41)

All

AUPRC†

 

0.69

[0.49–0.84]

0.82

[0.65–0.92]

0.90

[0.70–0.95]

0.81

[0.55–0.95]

Hausdorff distance†

 

38.5

[21.6–77.3]

31.7

[18.1–51.8]

27.2

[18.0–41.4]

32.2

[18.1–58.5]

Average symmetric surface distance†

 

2.5

[1.0–8.0]

1.4

[0.9–2.3]

1.4

[0.9–3.3]

1.7

[0.9–4.2]

DICE†

 

0.61

[0.38–0.76]

0.74

[0.58–0.84]

0.81

[0.57–0.88]

0.73

[0.49–0.87]

Jaccard†

 

0.45

[0.24–0.61]

0.59

[0.41–0.72]

0.69

[0.39–0.78]

0.58

[0.32–0.77]

Recall†

 

0.63

[0.35–0.85]

0.75

[0.59–0.90]

0.80

[0.57–0.91]

0.73

[0.37–0.91]

Precision†

 

0.65

[0.34–0.83]

0.73

[0.57–0.87]

0.84

[0.69–0.93]

0.74

[0.44–0.91]

True WMH volume, ml

0

8.2

[3.2–17.7]

22.9

[10.4–39.2]

57.3

[31.7–82.4]

22.3

[0.0–75.2]

Predicted WMH volume, ml

0.3

[0.0–1.1]

8.2

[2.6–14.7]

23.6

[11.7–37.3]

54.5

[28.1–74.2]

21.9

[0.0–72.0]

Absolute error of the predicted volume, ml

0.3

[0.0–1.1]

2.4

[0.1–4.5]

2.9

[0.1–7.7]

6.8

[0.1–25.7]

3.1

[0.0–15.9]

  1. Values are expressed as mean [95% CI].
  2. †These metrics were not aggregated in patients with a Fazekas scale of 0 because true WMH voxels did not exist.
  3. AUPRC, area under the precision-recall curve; WMH, white matter hyperintensity