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Table 4 The DSC values of 3D U-Net in pelvic bones segmentation on external validation set grouped by vendors

From: Fully automated pelvic bone segmentation in multiparameteric MRI using a 3D convolutional neural network

Pelvic bones DWI images ADC images
V1# (n = 41) V2$ (n = 11) V3& (n = 8) F value p value V1# (n = 41) V2$ (n = 11) V3& (n = 8) F value p value
Lumbar vertebra 0.82 ± 0.10* 0.76 ± 0.13 0.76 ± 0.06 2.307 0.109 0.85 ± 0.07 0.80 ± 0.06 0.80 ± 0.08 2.756 0.073
Sacrococcyx 0.84 ± 0.05* 0.81 ± 0.05* 0.73 ± 0.11 12.582 0.000 0.87 ± 0.04* 0.83 ± 0.05 0.83 ± 0.05 4.111 0.021
Ilium 0.82 ± 0.04* 0.78 ± 0.03 0.71 ± 0.07 27.470 0.000 0.87 ± 0.03* 0.87 ± 0.03* 0.81 ± 0.03 15.708 0.001
Acetabulum 0.80 ± 0.06* 0.71 ± 0.08 0.69 ± 0.08 13.876 0.000 0.84 ± 0.07* 0.82 ± 0.07* 0.70 ± 0.12 10.273 0.001
Femoral head 0.86 ± 0.06* 0.81 ± 0.06* 0.79 ± 0.10 4.053 0.023 0.88 ± 0.06* 0.88 ± 0.07* 0.82 ± 0.05 2.703 0.076
Femoral neck 0.84 ± 0.06* 0.82 ± 0.07* 0.74 ± 0.13 5.828 0.005 0.87 ± 0.08 0.88 ± 0.06 0.84 ± 0.03 0.870 0.425
Ischium 0.80 ± 0.10* 0.70 ± 0.08 0.70 ± 0.07 6.877 0.002 0.85 ± 0.06* 0.82 ± 0.04 0.78 ± 0.08 6.315 0.003
Pubis 0.69 ± 0.09* 0.61 ± 0.14 0.60 ± 0.11 6.212 0.004 0.77 ± 0.09* 0.78 ± 0.04* 0.67 ± 0.05 6.299 0.003
Average$ 0.81 ± 0.04* 0.75 ± 0.05 0.71 ± 0.07 22.405 0.001 0.85 ± 0.04* 0.83 ± 0.03 0.78 ± 0.04 13.420 0.001
  1. Unless otherwise specified, data are mean DSC value ± standard deviations. DSC: Dice similarity coefficient
  2. #V1 indicates Vendor 1: 3.0 T Discovery; $V2 indicates Vendor 2: 1.5 T Intera; &V3 indicates Vendor 3: 1.5 T Avanto
  3. *indicates a significantly high DSC value