Extracted Features from 4 Largest Spheres of Each PET Acquisition
| Feature category | Feature name |
| GLCM (18) | Angular second moment, auto correlation, cluster prominence, cluster shade, contrast, correlation, difference entropy, difference variance, dissimilarity, entropy, information correlation, inverse difference, inverse difference moment, maximum probability, sum average, sum entropy, sum-of-squares variance, sum variance |
| GLSZM (11) | Gray-level nonuniformity, high gray-level zone emphasis, large zone high gray emphasis, large zone low gray emphasis, large zone size emphasis, low gray-level zone emphasis, small zone high gray emphasis, small zone low gray emphasis, small zone size emphasis, zone size nonuniformity, zone size percentage |
| NGTDM (5) | Busyness, coarseness, complexity, contrast, texture strength |
| Shape (3) | Compactness, spheric dice coefficient, volume |
Details of feature calculations have been previously published (18,36).