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Table 1 Performance evaluation

From: Anatomy packing with hierarchical segments: an algorithm for segmentation of pulmonary nodules in CT images

Algorithms

Modified Williams index

Percentage statistic (%)

Overlapping ratio

Difference ratio

APHS

 Solid

1.015

97.50 ± 1.67

0.858 ± 0.06

0.142 ± 0.06

 Nonsolid

0.964

72.87 ± 4.72

0.747 ± 0.13

0.253 ± 0.13

 All

1.013

86.81 ± 2.75

0.802 ± 0.09

0.198 ± 0.075

NPHL [42]

 Solid

1.038

93.34 ± 6.7

0.807 ± 0.16

0.193 ± 0.172

 Nonsolid

0.859

55.85 ± 12.2

0.641 ± 0.11

0.359 ± 0.12

 All

0.981

75.62 ± 4.16

0.723 ± 0.16

0.277 ± 011

Growcut [28]

 Solid

1.091

96.50 ± 1.88

0.841 ± 0.1

0.159 ± 0.09

 Nonsolid

0.976

68.09 ± 7.96

0.696 ± 0.08

0.304 ± 0.11

 All

1.081

80.52 ± 4.86

0.754 ± 0.12

0.246 ± 0.11

  1. Comparison of APHS, NPHL [42] and Growcut [28] in evaluating the quality of the computer-generated boundaries with respect to the manually delineated boundaries using four metrics: the modified Williams index, percentage statistic, overlapping ratio and difference ratio.
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