Figure 3.

Most frequently selected features by MRMR using combined radiomic/optomic features derived from 5 × 5 mm sub-image samples when adipose tissue samples were (a) included and (b) excluded. These subplots relate directly to classification performances shown in Fig. 2c,f, respectively. Vertical axes signify the fraction of all n = 1000 Monte Carlo CV splits that MRMR selected each feature. Asterisks (*) signify first-order micro-CT features. Dots (•) signify high spatial frequency (0.61 or 1.37 mm⁻¹) reflectance, SFDI-derived features. Twenty-five features are listed in each subplot, though additional features were selected less frequently. A complete listing of radiomic/optomic feature abbreviations can be found in Supplementary Material Appendix 5.3.