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0bfacc2 2b36d07 0bfacc2 2b36d07 0bfacc2 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 | # Erasmus MC — Biomedical Imaging Group Rotterdam (BIGR)
The **Biomedical Imaging Group Rotterdam (BIGR)** is a research group at Erasmus MC developing AI and machine learning methods for medical image analysis. Our work spans quantitative imaging, radiomics, and deep learning for clinical decision support across multiple organ systems and imaging modalities.
🌐 [bigr.nl](https://bigr.nl)
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## Models
### Liver Lesion Characterization (MRI)
Fine-tuned vision-language model adapters for LI-RADS feature classification from multiphase liver MRI, developed as part of an EMMBIOME master's thesis by **Amal Lahchim** (2026).
| Model | Base model |
|---|---|
| [medgemma-4b-liver-lesion-lora](https://huggingface.co/erasmusmc-bigr/medgemma-4b-liver-lesion-lora) | Google MedGemma 4B |
| [gemma3-4b-liver-lesion-lora](https://huggingface.co/erasmusmc-bigr/gemma3-4b-liver-lesion-lora) | Google Gemma 3 4B |
Related resources: [Pipeline code](https://gitlab.com/radiology/radiomics/lai/vision_language_models/liver-lesion-vlm) · [LI-RADS Lexicon (Zenodo)](https://doi.org/10.5281/zenodo.21702498)
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## Contact
**Dr. Martijn Starmans** · Assistant Professor · Erasmus MC, Rotterdam
[m.starmans@erasmusmc.nl](mailto:m.starmans@erasmusmc.nl)
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