Reproduce “CheXbert: Combining Automatic Labelers and Expert Annotations for Accurate Radiology Report Labeling Using BERT” on OpenResearch

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About this paper

Akshay Smit, Saahil Jain, Pranav Rajpurkar, Anuj Pareek, Andrew Y. Ng, Matthew P. Lungren

CheXbert, a BERT-based system, accurately extracts 14 common chest X-ray observations from radiology reports by employing a two-stage hybrid training approach. It achieved an F1 score of 0.798, representing a 0.055 F1 point improvement over previous rule-based methods and closely approximating radiologist-level accuracy.

Key insights

  • A hybrid supervision strategy combining large-scale automatic labels with small-scale expert annotations yields superior performance in medical NLP.
  • Domain-specific pre-training for language models significantly boosts effectiveness in specialized medical contexts.
  • Data augmentation techniques like backtranslation are valuable for enhancing models trained with limited expert-annotated data.

Summary by alphaXiv.

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