Table 3.

ROC analysis results of PET differential texture between the young and elderly rhesus macaque groups

Organ	Radiomics Feature(RF)	AUC	Threshold
Brain	SHAPE_Sphericity[onlyFor3DROI]	1	0.718
R-Fat	CONVENTIONAL_TLG(mL)[onlyForPETorNM]	0.933	1.931
	DISCRETIZED_TLG(mL)[onlyForPETorNM]	0.933	7.165
	SHAPE_Volume(mL)	1	2
	SHAPE_Volume(vx)	1	250
	SHAPE_Sphericity[onlyFor3DROI])	0.1
	SHAPE_Surface(mm2)[onlyFor3DROI]	1	1636
	GLRLM_RLNU	0.933	126
	NGLDM_Coarseness	0.033
	GLZLM_GLNU	0.933	3.9
	GLCM_Correlation	0.8	0.455
L-Fat	CONVENTIONAL_TLG(mL)[onlyForPETorNM]	0.933	1.942
	DISCRETIZED_TLG(mL)[onlyForPETorNM]	0.933	7.153
	SHAPE_Volume(mL)	1	2.003
	SHAPE_Volume(vx)	1	251
Thyroid	CONVENTIONAL_SUVbwQ2	0.933	0.66
R-Lung	CONVENTIONAL_TLG(mL)[onlyForPETorNM]	1	62
	DISCRETIZED_TLG(mL)[onlyForPETorNM]	1	283
	SHAPE_Surface(mm2)[onlyFor3DROI]	0.833	26,022
L-Lung	SHAPE_Volume(mL)	0.933	128
	SHAPE_Volume(vx)	0.933	2934
	SHAPE_Surface(mm2)[onlyFor3DROI]	0.967	26,388
	SHAPE_Compacity[onlyFor3DROI]	0.9	5.818
	GLRLM_GLNU	0.8	530
	GLZLM_LZHGE	0.867	154,555
	NGLDM_Busyness	0.767	27.722
Stomach	CONVENTIONAL_SUVbwKurtosis	0.9	2.451
	CONVENTIONAL_SUVbwExcessKurtosis	0.9	-0.55
	SHAPE_Volume(mL)	0.867	1.5
L-Kidney	GLRLM_RLNU	0.867	157
L4	GLZLM_GLNU	0.867	3.451
Thymus
Aorta
Left Ventricular
Liver
Pancreas
R-Kidney
Spleen