What the programme covers
Foundation-model pretraining can consume broad data, but scale does not remove the need for provenance, privacy, sampling and contamination control. Over-represented sites, devices or common examinations can dominate representations unless the programme measures them.
What a useful specification includes
A defensible request defines the clinical task, source evidence and acceptance criteria before patient-level data moves. The exact fields and thresholds depend on the intended model claim.
- Pretraining objectives and supported modalities
- Source, site, device and population sampling
- Patient, study and near-duplicate handling
- Image-text or multimodal pairing rules
- Privacy and permitted downstream use
- Protected evaluation and benchmark sets
Quality and validation controls
Foundation-model quality controls operate at corpus and case level. They record source composition, remove or group duplicates and protect evaluation cases from pretraining leakage.
- Patient, series and perceptual deduplication
- Source and acquisition distribution analysis
- Image-report pair verification
- Privacy validation at scale
- Evaluation contamination controls
Availability, rights and delivery
Large-scale programmes can be released in governed versions with immutable manifests, source-aware sampling records and documented permitted uses.
Public pages describe a sourcing and engineering capability, not guaranteed ready inventory. Each release remains subject to verified programme inventory, programme-specific authorization, privacy review, technical acceptance and buyer licence terms.
Questions, answered directly.
Can reports be paired with images for pretraining?+
Yes when pair identity, privacy, programme rights and final-report status are verified.
Does a foundation model need every label?+
No. Pretraining may be self-supervised or weakly supervised, but downstream evaluation still needs reliable task evidence.
How is benchmark contamination prevented?+
Protected evaluation cases are identified and excluded from pretraining inputs under recorded rules.
Is unlimited downstream reuse allowed?+
Only if the programme and buyer licence expressly permit it; foundation-model uses must be defined in scope.