docs: update dataset card with official citation, DOI, and license

README.md

@@ -1,55 +1,38 @@
 ---
-dataset_info:
-  builder_name: dataset_loader
-  config_name: default
-  data_files:
-  - split: train
-    path: classification/Training/**
-  - split: test
-    path: classification/Testing/**
-license: apache-2.0
+license: cc-by-4.0
+task_categories:
+- image-classification
 language:
 - en
 tags:
-- biology
+- mri
+- brain-tumor
+- glioma
+- meningioma
+- pituitary
 - medical
-- brain
-- image
-- classification
-- image-classification
-size_categories:
-- 1K<n<10K
-
 ---
-# Brain Cancer MRI Classification Dataset
-
-This dataset contains MRI images for brain cancer classification, organized for machine learning tasks. It is suitable for use with Hugging Face datasets and model training.
 
-## Dataset Structure
-- `classification/Training/` - Training images, organized by cancer type (e.g., glioma, meningioma, pituitary)
-- `classification/Testing/` - Testing images, organized similarly
+# Brain_Cancer_MRI_Classsification
 
-## Labels
-- `glioma`
-- `meningioma`
-- `pituitary`
-- `notumor`
+Part of the **Brain Tumor MRI Dataset** collection.
 
-## Usage
-You can use this dataset for:
-- Image classification
-- Deep learning model training
-- Medical image analysis
+Brain Tumor MRI dataset for classification and segmentation of Glioma, Meningioma, and Pituitary tumors originally provided by Cheng et al. on Figshare.
 
-## Example
-```python
-from datasets import load_dataset
-
-dataset = load_dataset('huseyincavus/Brain_Cancer_MRI_Classsification')
-```
+## Original Source & License
+* **Official Source / Project:** [Brain Tumor MRI Dataset](https://figshare.com/articles/dataset/brain_tumor_dataset/1512427)
+* **License:** Creative Commons Attribution 4.0 International (`cc-by-4.0`)
+* **Official DOI:** [10.6084/m9.figshare.1512427.v5](https://doi.org/10.6084/m9.figshare.1512427.v5)
 
 ## Citation
- Kaggle: https://www.kaggle.com/datasets/huseyincavus/brainmri-classification
-
-## License
-This dataset is licensed under the Apache License 2.0.
+If you use this dataset in your research or project, please cite the original authors:
+
+```bibtex
+@article{cheng2017brain,
+  title={Brain tumor dataset},
+  author={Cheng, Jun},
+  journal={Figshare},
+  year={2017},
+  doi={10.6084/m9.figshare.1512427.v5}
+}
+```