8. Precise Feature Screening
Background. Some voxel features change a lot when the same tumour is rescanned or computed with slightly different settings; habitats built on them are unstable. Purpose. Keep only features that agree under a simulated retest and across settings (measured by ICC), then check whether habitats built on them are more stable on this demo.
Repeatability and reproducibility screening (Prior et al., 2024): simulated image retest perturbation (noise, translation, rotation) and ROI contour edge perturbation, evaluated across kernel radii and bin widths with multi-panel ICC forest plots.
The main gallery page also clusters habitats on the same subject with and without the precise whitelist under the Appendix S2 retest: without precise, original and perturbed habitat maps disagree; with precise, mean Dice rises and labelled-voxel disagreement falls on this demo (modestly).
