Auto100%Harbor adapterMultimodalKnowledge & Reasoning

BrainTRACE

BrainTRACE: Tracing Longitudinal, Multimodal, and Volumetric Evidence in Brain MRI Clinical Reasoning

A report-grounded benchmark with 7,273 VQA instances from 1,778 longitudinal patients evaluating vision-language models on brain MRI evidence tracing.

How to run

ltb · braintrace
$ npm i -g lettokenburn-cli
$ ltb bench pull braintrace --n 50
$ ltb bench run ./braintrace -a claude-code -m anthropic/claude-opus-4-8
$ ltb bench push

Runs happen on your machine with your own subscription; only the score summary is pushed. CLI docs

Scores

13 sourced entries
HarnessSourceConfidenceLink
GPT-541.9N/AIndependentmediumOct 5, 2026arxiv.org
GPT-5.440.4N/AIndependentmediumOct 5, 2026arxiv.org
GPT-5-mini38.2N/AIndependentmediumOct 5, 2026arxiv.org
qwen3.5-27B37.3N/AIndependentmediumOct 5, 2026arxiv.org
Gemini 2.5 Pro36.5N/AIndependentmediumOct 5, 2026arxiv.org
InternVL3-8B35.8N/AIndependentmediumOct 5, 2026arxiv.org
InternVL3-78B35.5N/AIndependentmediumOct 5, 2026arxiv.org
InternVL3-14B35.1N/AIndependentmediumOct 5, 2026arxiv.org
Qwen3-VL-30B35.1N/AIndependentmediumOct 5, 2026arxiv.org
Qwen3-VL-8B-Instruct33.7N/AIndependentmediumOct 5, 2026arxiv.org
Qwen2.5-VL-7B33.2N/AIndependentmediumOct 5, 2026arxiv.org
Qwen3-VL-4B32.7N/AIndependentmediumOct 5, 2026arxiv.org
Claude Opus 4.629.8N/AIndependentmediumOct 5, 2026arxiv.org

Every number links to where it was published. Low-confidence rows are muted and need per-cell verification.

Reproduced by the community

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About

BrainTRACE contains 7,273 scored VQA instances derived from 1,778 longitudinal patients and ~29k 3D MRI volumes. It evaluates five levels of clinical reasoning across four evidence demands: longitudinal comparison, multi-sequence integration, volumetric spatial evidence, and report-grounded references.

The benchmark uses exact closed-form scoring for specific questions and factual audit scoring for open-ended answers. Evaluation of 20 VLM configurations reveals a significant gap in composing grounded longitudinal interpretations, with the best case success rate at only 1.4%.