LLaMA 3.1 accurately extracts brain atrophy scores and microbleed mentions from Dutch MRI reports

An open-weight LLM (LLaMA 3.1) extracted structured data from 947 Dutch brain MRI reports. Zero-shot accuracy: 0.90-0.96 for atrophy scores, 0.93 for microbleed detection. Few-shot prompting boosted microbleed count extraction to 0.92 accuracy. Text similarity for lesion locatio…

• Few-shot prompting with similarity-based selection improved numerical variable extraction: microbleed count accuracy 0.92 [0.90-0.93], infarct count 0.81 [0.77-0.85].
• Challenges remain for location-specific variables.

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