Impact of FWHM on Image Features
| Feature | COV ≤ 5% | 5% < COV ≤ 10% | 10% < COV ≤ 20% | COV > 20% |
| SUV | SUVmean, SUVpeak | SUVmax | ||
| FOS | Entropy | COV, kurtosis, energy | Variance, skewness | |
| GLCM | Energy, entropy, ID, SE, DE, IMC, IDN, IDMN, DM | Dissimilarity, homogeneity, MP, SA, SDN | Autocorrelation, contrast, correlation, SOS, SV, DV | CS |
| GLRLM | GLNr, RP, LGRE, HGRE | RLN | SRE, LRE, SRLGE, SRHGE, LRLGE, LRHGE | |
| GLSZM | LGZE | GLNz, ZLN, HGZE | LZE, SZHGE, LZLGE, WVGLZ_N, WVGLZ_S | SZE, ZP, SZLGE, LZHGE |
| NGLDM | Entropy | SNE, NN, SM | LNE | |
| NGTDM | TS | Coarseness, contrast, busyness | Complexity |
ID = inverse difference; SE = sum entropy; DE = difference entropy; IMC = information measure of correlation; DM = diagonal moment; MP = maximum probability; SA = sum average; SDN = second diagonal moment; SOS = sum of squares; SV = sum variance; DV = difference variance; GLNr = grey-level nonuniformity for run; RP = run percentage; LGRE = low grey-level run emphasis; HGRE = high grey-level run emphasis; RLN = run-length nonuniformity; SRE = short-run emphasis; LRE = long-run emphasis; SRLGE = short-run low grey-level emphasis; SRHGE = short-run high grey-level emphasis; LRLGE = long-run low grey-level emphasis; LRHGE = long-run high grey-level emphasis; LGZE = low grey-level zone emphasis; GLNz = grey-level nonuniformity for zone; ZLN = zone-length nonuniformity; HGZE = high grey-level zone emphasis; LZE = long-zone emphasis; SZHGE = short-zone high grey-level emphasis; LZLGE = long-zone low grey-level emphasis; WVGLZ_N = weighted variance of gray-level size, N direction; WVGLZ_S = weighted variance of gray-level size, S direction; SZE = short-zone emphasis; SZLGE = short-zone low grey-level emphasis; LZHGE = long-zone high grey-level emphasis; SNE = small number emphasis; NN = number nonuniformity; SM = second moment; LNE = large number emphasis; TS = texture strength.