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 Normaliser-Domain Gate (preprocess-imaging)
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  contract: CTNormalization (assumes hounsfield), clip [-38, 174]
| Check | Severity | Detail |
|---|---|---|
| NORMALIZER_DOMAIN_MISMATCH | Major | the contract applies CTNormalization, which assumes Hounsfield units, but 0 of 10 case(s) in 'external_mri' contain a voxel at or below -500. Hounsfield units are defined by an air floor near -1000; a cohort that never goes negative is not in them. Per-case minima range 0 to 0. |
| NORMALIZER_SPLIT_DIVERGENCE | Flag | 6 of 10 case(s) in 'unlabelled_pool' bottom out near air and the rest do not — mixed modality, or a rescale applied to part of the cohort. One normalisation contract cannot be right for both. |

MAJOR candidate: 1 domain issue(s).
