Table 2 Radiomic parameters extracted from PET/CT images

SUV/HU_min

HISTO_Skewness

GLZLM_SZE

(Short-Zone Emphasis)

GLRLM_SRE

(Short-Run Emphasis)

GLCM_Homogeneity

NGLDM_Coarseness

SUV/HU_mean

HISTO_Kurtosis

GLZLM_LZE

(Long-Zone Emphasis)

GLRLM_LRE

(Long-Run Emphasis)

GLCM_Energy

NGLDM_Contrast

SUV/HU_std

HISTO_Entropy_log10

GLZLM_LGZE

(Low Gray-level Zone Emphasis)

GLRLM_LGRE

(Low Gray-level Run Emphasis)

GLCM_Contrast

NGLDM_Busyness

SUV/HU_max

HISTO_Entropy_log2

GLZLM_HGZE

(High Gray-level Zone Emphasis)

GLRLM_HGRE

(High Gray-level Run Emphasis)

GLCM_Correlation

SUV_peak*

HISTO_Energy

GLZLM_SZLGE

(Short-Zone Low

Gray-level Emphasis)

GLRLM_SRLGE

(Short-Run Low Gray-level Emphasis)

GLCM_Entropy_log10

TLG*

SHAPE_Sphericity

GLZLM_SZHGE

(Short-Zone High

Gray-level Emphasis)

GLRLM_SRHGE

(Short-Run High Gray-level Emphasis)

GLCM_Entropy_log2

SHAPE_Compacity

GLZLM_LZLGE

(Long-Zone Low

Gray-level Emphasis)

GLRLM_LRLGE

(Long-Run Low Gray-level Emphasis)

GLCM_Dissimilarity

SHAPE_Volume (mL)

GLZLM_LZHGE

(Long-Zone High

Gray-level Emphasis)

GLRLM_LRHGE

(Long-Run High Gray-level Emphasis)

SHAPE_Volume(vx)

GLZLM_GLNU

(Gray-Level Non-Uniformity for zone)

GLRLM_GLNU

(Gray-Level Non-Uniformity for run)

GLZLM_ZLNU

(Zone Length Non-Uniformity)

GLRLM_RLNU

(Run Length Non-Uniformity)

GLZLM_ZP

(Zone%)

GLRLM_RP

(Run Percentage)