Affiliation:
1. School of Computer Science and Engineering, Vellore Institute of Technology, Vellore, India
Abstract
Background:
In recent years, Alzheimer's Disease (AD) has received more attention in the
field of medical imaging, which leads to cognitive disorders. Physicians mainly rely on MRI imaging
to examine memory impairment, thinking skills, judge functional abilities, and detect behavioral abnormalities
for diagnosing Alzheimer's disease.
Objective:
Early diagnosis of AD has become a challenging and strenuous task with conventional
methods. The diagnostic procedure becomes complicated due to the structure and heterogeneous dimensions
of the brain. This paper visualizes and analyzes the publications on AD and furnishes a detailed
review based on the stages involved in the early detection of the disease.
Methods:
This paper also focuses on assorted stages of disease detection such as image preprocessing,
segmentation, feature extraction, classification, and optimization techniques that have been used in the
diagnosis of AD during the past five years. It also spotlights the deep learning models used in assorted
stages of detection. This paper also highlights the benefits of each method for assorted modalities of
images.
Results:
AD has been analyzed with various computational methods on a few datasets, which leads to
high computation time and loss of important features. Hybrid methods can perform better in every
diagnosis stage of AD than others. Finally, the assorted datasets used for the diagnosis and investigation
of Alzheimer's disease were analyzed and explored using a computerized system for future scope.
Conclusion:
From the review papers, we can conclude that DNN has greater accuracy in MR images
and CNN +AEC has the best accuracy in the multimodal images.
Publisher
Bentham Science Publishers Ltd.
Subject
Radiology, Nuclear Medicine and imaging