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Table 2: 
Results of the healthy subject analysis in terms of peak flow rate difference, peak flow rate repeatability, stroke volume difference, stroke volume repeatability, and pulsatility index difference
Comparison PairsBland-AltmanOrthogonal Regression
A (Frames)B (Frames)BiasLoAPEquationρ
Peak flow rate difference (mL/s)2D reference-1 (30)4D PROUD-1 (30)0.31 ± 0.131.41.22y = 1.14x – 0.800.67
2D reference-1 (30)4D PROUD-1 (15)0.51 ± 0.131.44.03y = 1.15x – 1.040.66
2D reference-1 (30)4D PROUD-1 (7)0.76 ± 0.131.44<.01y = 0.90x – 0.420.60
2D reference-1 (30)4D SENSE (7)0.79 ± 0.171.81.01y = 0.83x – 0.190.36
Peak flow rate repeatability (mL/s)4D PROUD-1 (30)4D PROUD-2 (30)0.14 ± 0.080.90.61y = 0.87x + 0.280.87
4D PROUD-1 (15)4D PROUD-2 (15)0.12 ± 0.080.87.90y = 0.84x + 0.370.88
4D PROUD-1 (7)4D PROUD-2 (7)0.09 ± 0.070.71.77y = 0.90x + 0.170.89
2D reference-1 (30)2D reference-2 (30)0.19 ± 0.080.86.38y = 1.01x – 0.230.86
Stroke volume difference (mL)2D reference-1 (30)4D PROUD-1 (30)0.11 ± 0.090.94.53y = 0.99x – 0.080.64
2D reference-1 (30)4D PROUD-1 (15)0.11 ± 0.090.94.45y = 0.97x – 0.040.64
2D reference-1 (30)4D PROUD-1 (7)0.14 ± 0.090.93.36y = 0.95x – 0.030.64
2D reference-1 (30)4D SENSE (7)0.15 ± 0.111.18.36y = 1.06x – 0.290.46
Stroke volume repeatability (mL)4D PROUD-1 (30)4D PROUD-2 (30)0.08 ± 0.040.43.57y = 0.98x – 0.050.93
4D PROUD-1 (15)4D PROUD-2 (15)0.08 ± 0.040.42.60y = 0.98x – 0.040.92
4D PROUD-1 (7)4D PROUD-2 (7)0.07 ± 0.040.44.64y = 1.00x – 0.080.92
2D reference-1 (30)2D reference-2 (30)0.06 ± 0.040.47.80y = 1.10x – 0.280.92
Pulsatility index difference (a.u.)2D reference-1 (30)4D PROUD-1 (30)0.01 ± 0.040.39.41y = 1.97x – 0.820.15
2D reference-1 (30)4D PROUD-1 (15)0.18 ± 0.040.39<.01y = 1.51x – 0.600.10
2D reference-1 (30)4D PROUD-1 (7)0.31 ± 0.030.33<.01y = 0.01x + 0.510.01
2D reference-1 (30)4D SENSE (7)0.31 ± 0.030.35<.01y = 0.03x + 0.500.02
  • Note:—LoA indicates limits of agreement; a.u., arbitrary units.