Prediction of Chemotherapy Response of Osteosarcoma Using Baseline ¹⁸F-FDG Textural Features Machine Learning Approaches with PCA

Table 1

Index of textural features in global, local, and regional areas.

Feature family	Features
Intensity histogram	SUVmax
	SUVmean
	Standard deviation
	Total lesion glycolysis (TLG)
	Metabolic tumor volume (MTV)
	1st entropy
Gray level co-occurrence matrix (GLCM)	Energy
	Contrast
	Entropy
	Homogeneity
	Dissimilarity
Neighboring gray level dependence matrix (NGLDM)	Small number emphasis
	Large number emphasis
	Coarseness
	Busyness
Gray level run length matrix (GLRLM)	Short run emphasis
	Long run emphasis
	Gray level nonuniformity
	Run length nonuniformity
	Low gray level run emphasis
	High gray level run emphasis
Gray level size zone matrix (GLSZM)	Small zone emphasis
	Large zone emphasis
	Gray level nonuniformity
	Zone size nonuniformity
	Low gray level zone emphasis
	High gray level zone emphasis