Brain Tumor MRI Dataset (Glioma, Meningioma, Pituitary, No Tumor)

This dataset contains 11,148 pre-processed T1-weighted contrast-enhanced MRI brain images, categorized into four classes: Glioma, Meningioma, Pituitary, and No Tumor. The dataset is split into 80% training data and 20% testing data. Images are organized into subfolders by class. It is suitable for machine learning and deep learning research in brain tumor classification, tumor detection, and computer-aided diagnosis.