MedGemma 1.5 Technical Report
- Published
- Source
- arXiv
- Paper number
- 142
- Field
- Multimodal / Medical
- arXiv ID
- 2604.05081
Key points
- We introduce MedGemma 1.5 4B, the latest model in the MedGemma collection.
- MedGemma 1.5 extends MedGemma 1 by integrating additional capabilities: high-dimensional medical imaging, including CT and MRI volumes and whole-slide histopathology images; anatomical localization with bounding boxes; multi-view chest X-ray analysis; and improved medical document understanding, including lab reports and electronic health records.
- The report details the innovations needed to enable these modalities within a single architecture, including new training data, long-context 3D volume slicing, and whole-slide pathology sampling.
- Compared with MedGemma 1 4B, MedGemma 1.5 4B shows substantial gains on these new domains, improving 3D MRI state classification accuracy by 11% and 3D CT state classification by 3% in absolute terms.
- On whole-slide pathology images, MedGemma 1.5 4B improves macro F1 by 47%.
- It also improves anatomical localization in chest X-rays by increasing Intersection over Union by 35%, and it achieves 4% macro accuracy on longitudinal chest X-ray analysis.
Paper links
External research summaries. These are not HDATF publications or measured product results.