Enhance My 2D CNN for Alzheimer's Classification

My 2D CNN model, designed for classifying Alzheimer's disease using MRI scans, is exhibiting high training accuracy but low testing accuracy, indicating an overfitting issue. I am seeking a skilled professional who can help rectify this problem so that my model achieves a performance level comparable/better than current models in the field, thereby demonstrating some novelty or benefit.

Ideal Skills and Experience:
- Deep learning and CNN architecture
- Expertise in handling overfitting issues
- Proficiency in data preprocessing and augmentation
- Experience with MRI scan analysis
- Able to enhance model performance for research comparability