. Author manuscript; available in PMC: 2019 Jun 6.

Published in final edited form as: IEEE Trans Med Imaging. 2018 Nov 29;38(6):1384–1397. doi: 10.1109/TMI.2018.2884142

TABLE III.

Performance Metrics Comparing Regions Delineated by Outer Border as Detected by Various Interpolation & Surface Fitting Techniques

Metric	Anisotropic Linear-Elastic Mesh	Interpolation Methods			Surface Fitting Methods
		Linear Interpolation	Nearest Neighbor Interpolation	Cubic Spline Interpolation	Polynomial Surface Model (5^th Degree)^a	Local Linear Regression	Local Quadratic Regression
Sensitivity	90.79	81.89	82.35	81.94	80.74	81.11	80.96
Specificity	99.00	99.19	99.10	99.18	99.42	99.47	99.46
Jaccard Index	83.67	76.61	76.48	76.56	76.90	77.62	77.39
Dice Index	91.11	86.75	86.67	86.73	86.94	87.40	87.25
R_over	0.9079	0.8189	0.8235	0.8194	0.8074	0.8111	0.8096
R_nonover	0.1773	0.2501	0.2533	0.2508	0.2426	0.2339	0.2366

Z = p00 + p10 × x + p01 × y+ ⋯ + p14 × xy⁴ + p05 × y⁵