Table 5.

Comparison of the classification results of pulmonary nodules by BP neural network.

Feature extraction method	Accuracy	Sensitivity	Specificity	Precision	F1 Score
VLDTP	0.875	0.8889	0.8614	0.8627	0.8756
VLDTP+ Gray histogram	0.88	0.89	0.87	0.87.25	0.8812
3D-GLCM	0.77	0.8333	0.6957	0.7964	0.7627
3D-GLCM+ Gray histogram	0.86	0.8687	0.8515	0.8515	0.86

3D-GLCM, 3-Dimensional Gray-Level Co-Occurrence Matrix, VLDTP, Volume Local Direction Ternary Pattern.