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README.md

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-license: cc-by-4.0
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+---
+license: cc-by-4.0
+---
+# MedMNIST Dataset
+
+This dataset is derived from [MedMNIST v2](https://medmnist.com/), a large-scale lightweight benchmark for biomedical image classification.
+
+## Source and Citation
+
+Please cite the original paper when using this dataset:
+
+Yang, J., Shi, R., Wei, D. et al.  
+MedMNIST v2: A Large-Scale Lightweight Benchmark for 2D and 3D Biomedical Image Classification.  
+*Scientific Data* 10, 125 (2023). https://doi.org/10.1038/s41597-023-01920-1
+
+## License
+
+This dataset is licensed under the [Creative Commons Attribution 4.0 International License (CC BY 4.0)](https://creativecommons.org/licenses/by/4.0/).  
+You are free to share and adapt the dataset, even for commercial purposes, provided appropriate credit is given.
+
+## Dataset Description
+
+MedMNIST is a collection of standardized biomedical image datasets, including but not limited to:
+
+- PathMNIST
+- OCTMNIST
+- PneumoniaMNIST
+- ...
+
+## Files
+
+- `pathmnist.npz` — example dataset file
+- `octmnist.npz` — example dataset file
+
+---
+
+For more details and dataset download, visit [MedMNIST GitHub](https://github.com/MedMNIST/MedMNIST).