Convolutional Neural Network-based MR Image Analysis for Alzheimer’s Disease Classification

Author(s): Boo-Kyeong Choi, Nuwan Madusanka, Heung-Kook Choi*, Jae-Hong So, Cho-Hee Kim, Hyeon-Gyun Park, Subrata Bhattacharjee, Deekshitha Prakash

Journal Name: Current Medical Imaging
Formerly: Current Medical Imaging Reviews

Volume 16 , Issue 1 , 2020

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Graphical Abstract:


Abstract:

Background: In this study, we used a convolutional neural network (CNN) to classify Alzheimer’s disease (AD), mild cognitive impairment (MCI), and normal control (NC) subjects based on images of the hippocampus region extracted from magnetic resonance (MR) images of the brain.

Methods: The datasets used in this study were obtained from the Alzheimer's Disease Neuroimaging Initiative (ADNI). To segment the hippocampal region automatically, the patient brain MR images were matched to the International Consortium for Brain Mapping template (ICBM) using 3D-Slicer software. Using prior knowledge and anatomical annotation label information, the hippocampal region was automatically extracted from the brain MR images.

Results: The area of the hippocampus in each image was preprocessed using local entropy minimization with a bi-cubic spline model (LEMS) by an inhomogeneity intensity correction method. To train the CNN model, we separated the dataset into three groups, namely AD/NC, AD/MCI, and MCI/NC. The prediction model achieved an accuracy of 92.3% for AD/NC, 85.6% for AD/MCI, and 78.1% for MCI/NC.

Conclusion: The results of this study were compared to those of previous studies, and summarized and analyzed to facilitate more flexible analyses based on additional experiments. The classification accuracy obtained by the proposed method is highly accurate. These findings suggest that this approach is efficient and may be a promising strategy to obtain good AD, MCI and NC classification performance using small patch images of hippocampus instead of whole slide images.

Keywords: Convolution neural network, Alzheimer’s diseases, mild cognitive impairments, normal controls, hippocampus, local entropy.

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VOLUME: 16
ISSUE: 1
Year: 2020
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DOI: 10.2174/1573405615666191021123854
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