Research Article

Parameters Influencing PET Imaging Features: A Phantom Study with Irregular and Heterogeneous Synthetic Lesions

Table 4

The radiomic features considered in the work.

Feature nameFeature group

MTVIFM
Surface
Spherical disproportion
Sphericity
Surface-volume ratio (SV)

MaximumIFHIST
Minimum
Mean
Median
Mean absolute deviation (MAD)
Root mean square (RMS)
Energy
Entropy
Kurtosis
Skewness
Standard deviation
Uniformity
Variance

EnergyIFTX-GLCM
Contrast
Entropy
Homogeneity
Correlation
SumAverage
Variance
Dissimilarity
Autocorrelation

Short run emphasis (SRE)IFTX-GLRLM
Long run emphasis (LRE)
Gray-level nonuniformity (GLN)
Run-length nonuniformity (RLN)
Run percentage (RP)
Low gray-level run emphasis (LGRE)
High gray-level run emphasis (HGRE)
Short run low gray-level emphasis (SRLGE)
Short run high gray-level emphasis (SRHGE)
Long run low gray-level emphasis (LRLGE)
Long run high gray-level emphasis (LRHGE)
Gray-level variance (GLV)
Run-length variance (RLV)

Small zone emphasis (SZE)IFTX-GLSZM
Large zone emphasis (LZE)
Gray-level nonuniformity (GLN)
Zone-size nonuniformity (ZSN)
Zone percentage (ZP)
Low gray-level zone emphasis (LGZE)
High gray-level zone emphasis (HGZE)
Small zone low gray-level emphasis (SZLGE)
Small zone high gray-level emphasis (SZHGE)
Large zone low gray-level emphasis (LZLGE)
Large zone high gray-level emphasis (LZHGE)
Gray-level variance (GLV)
Zone-size variance (ZSV)

CoarsenessIFTX-NGTDM
Contrast
Busyness
Complexity
Strength