A Novel Deep Learning Approach for Early Detection of Alzheimer’s Disease Using Multi-View MRI Image Fusion and Explainable AI

Alzheimer's disease (AD) is a progressive neurodegenerative disorder that affects millions worldwide.Early detection is critical for effective intervention, but current diagnostic methods often rely on subjective clinical assessments or invasive procedures.This paper proposes a novel deep learningbased approach for the early detection of Alzheimer's disease using multi-view MRI image fusion and explainable artificial intelligence (XAI).The proposed method integrates structural MRI (sMRI) and functional MRI (fMRI) data to capture both anatomical and functional brain changes associated with AD.A multi-stream convolutional neural network (CNN) architecture is designed to process sMRI and fMRI data separately, followed by a fusion module that combines features from both modalities.To enhance efficiency, gradient-weighted class activation mapping (Grad-CAM) to visualize regions of interest (ROIs) contributing to the diagnosis was employed.Experiments on the Alzheimer's Disease Neuroimaging Initiative (ADNI) dataset demonstrate that our approach achieves superior performance compared to state-of-the-art methods, with an accuracy of 95.3%, sensitivity of 94.7%, and specificity of 95.8%.This paper provides a novel approach for early AD detection, which improved clinical decision-making.