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Medicine

RadThinking: A Dataset for Longitudinal Clinical Reasoning in Radiology

Wenxuan Li, Pedro R. A. S. Bassi, Xinze Zhou, Jakob Wasserthal, Alan L. Yuille, Zongwei Zhou

Featured May 22, 2026

Original Paper

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Simply

A new dataset helps computers learn to think like doctors by asking them questions about cancer scans, breaking down hard problems into simple steps, and checking answers against real patient outcomes over time.

In depth
The paper introduces RadThinking, a novel Visual Question Answering (VQA) dataset designed to make clinical reasoning in cancer screening explicit and trainable for AI. It uniquely stratifies VQA questions into three difficulty tiers—foundation, single-step, and compositional—and provides chain-of-thought data grounded in clinical reporting standards and pathology-confirmed outcomes, enabling AI systems to learn complex diagnostic reasoning beyond mere perception.

Key Takeaways

  • 1
    RadThinking is the first VQA dataset for cancer screening that explicitly stratifies questions by reasoning depth, from atomic perception to multi-step compositional reasoning.
  • 2
    The dataset grounds compositional VQAs in clinical reporting standards (e.g., LI-RADS), providing explicit chains of foundation VQAs that mirror radiologists' diagnostic workflows.
  • 3
    It offers longitudinal imaging data with pathology-confirmed ground truth, enabling the training and evaluation of AI systems for complex, time-dependent cancer diagnosis and progression tracking.

Conceptual Flow

HIGH LEVEL
1
Methodology: Structured Reasoning for AI

The paper built a special dataset that teaches computers to think like doctors by breaking down complex medical questions into simple steps, just like a doctor would.

Patient Scans
Doctor Notes
Medical Rules
Organize & Link
Question Chains
Answer Steps
2
Results: Better Cancer Diagnosis

This new dataset helps computers learn to find cancer better by teaching them not just to spot things, but to understand why they are important, like a real doctor.

Old AI (Spots Things)
New AI (Understands Why)
Compare Performance
Better Cancer Reasoning
More Reliable Diagnosis