Neurodegenerative diseases, such as Alzheimer's and Parkinson's, are characterized by progressive loss of neuronal function and structure. Early and accurate diagnosis is crucial for effective management and treatment. Advanced imaging techniques, including Magnetic Resonance Imaging (MRI), Positron Emission Tomography (PET), and emerging modalities like functional MRI (fMRI) and Diffusion Tensor Imaging (DTI), have significantly enhanced the ability to diagnose these conditions. This paper reviews the current state of these imaging technologies, their applications in neurodegenerative disease diagnosis, and their potential future developments.