An assistive, non-autonomous multi-reader system for adult PA/AP chest radiographs. Every finding ships with a measured operating point and a stated validation basis — no single hero number. Model and dataset details are held in a separate confidential record.
Measured leave-site-out. The shipped point targets ≈90% specificity; a high-sensitivity point is available per finding. PPV is stated at the cohort reference prevalence — these readers are strong rule-outs (high NPV).
| Finding | AUC | Sens | Spec | NPV |
|---|---|---|---|---|
| Pleural effusion | 0.91 | 0.76 | 0.90 | 0.95 |
| Pneumothorax | 0.90 | 0.76 | 0.90 | 0.99 |
| Cardiomegaly | 0.85 | 0.68 | 0.90 | 0.95 |
| Atelectasis | 0.84 | 0.55 | 0.90 | 0.98 |
| Normal/abnormal triage | 0.90 | 0.66 | 0.90 | 0.74 |
The deployed models, unchanged, run against radiographs from institutions and scanners absent from all training data. Discrimination (AUC) transfers; thresholds are re-calibrated per site. The cohorts include a US community hospital and an independent multi-site benchmark of ~6,000 studies.
| Finding | Leave-site-out | US hospital | Independent benchmark |
|---|---|---|---|
| Pleural effusion | 0.90 | 0.95 | 0.92 |
| Cardiomegaly | 0.90 | 0.93 | 0.88 |
| Pneumothorax | 0.88 | 0.95 | 0.87 |
| Consolidation | 0.82 | 0.96 | 0.82 |
| Atelectasis | 0.82 | 0.84 | 0.82 |
Fifteen findings plus an advisory triage gate, validated across 15 public datasets spanning 6 countries and 2 labelling regimes. The encoder is commercially licensed, and a commercial-clean build — trained only on openly-licensed data — is available for customers requiring full data provenance; several readers already run on those clean weights in production. Localisation is provided as advisory overlays for structural findings plus a trained detector returning real bounding boxes for nodules.