Table 2 Overview of the geometric and quantitative results for refU, cropU, crinU and cropU_A in the T1 map test dataset separated for native and contrast enhanced T1 maps.

From: Introduction of a cascaded segmentation pipeline for parametric T1 mapping in cardiovascular magnetic resonance to improve segmentation performance

Metric

refU

cropU

crinU

cropU_A

Native

 Geometric

  DSC (%)

72.79 ± 8.08

81.06 ± 5.57*

81.22 ± 5.52*

81.13 ± 5.83*

  HD (mm)

3.74 ± 1.37

2.95 ± 1.06*

3.01 ± 1.20*

2.98 ± 1.16*

 Quantitative

  ME (ms)

− 7.22 ± 17.19

− 6.00 ± 14.67

− 5.24 ± 16.40*

− 3.88 ± 16.10*

  MAE (ms)

14.22 ± 12.06

11.94 ± 10.43

12.45 ± 11.89

12.45 ± 11.89

  RMSE (ms)

18.64

15.85

17.22

16.56

  CI (ms)

− 11.38 / − 3.05

− 9.56 / − 2.44

− 9.22 / − 1.26

− 7.79 / 0.02

  CV (%)

2.38

2.45

3.13

4.15

  r (Pearson)

0.97*

0.97*

0.97*

0.97*

  CoD (%)

94.09

94.09

94.09

94.09

  τ (Kendall)

0.80*

0.83*

0.82*

0.83*

Contrast enhanced

 Geometric

  DSC (%)

71.41 ± 8.54

80.70 ± 10.31*

79.18 ± 10.20*

80.15 ± 10.21*

  HD (mm)

3.83 ± 1.44

3.08 ± 1.72*

3.35 ± 1.90*

3.27 ± 2.05*

 Quantitative

  ME (ms)

5.23 ± 8.14

4.45 ± 8.39

5.17 ± 7.27

4.57 ± 7.85

  MAE (ms)

5.89 ± 7.67

5.32 ± 7.87

6.07 ± 6.54

5.07 ± 7.53

  RMSE (ms)

9.67

9.50

8.92

9.08

  CI (ms)

1.70 / 8.77

0.81 / 8.10

2.01 / 8.34

1.15 / 7.98

  CV (%)

1.56

1.89

1.41

1.72

  r (Pearson)

0.98*

0.98*

0.98*

0.98*

  CoD (%)

96.04

96.04

96.04

96.04

  τ (Kendall)

0.91*

0.91*

0.92*

0.94*

  1. DSC dice similarity coefficient, HD Hausdorff distance, ME mean error, MAE mean absolute error, RMSE root-mean-squared error, CI confidence interval, CV coefficient of variation, r Pearson’s correlation coefficient, CoD coefficient of determination, τ Kendall’s Tau coefficient; values are given as mean ± standard deviation.
  2. *Denotes statistical significance with a significance level of p < 0.05.
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