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• W2066624552 abstract "Dementia is an age-related cognitive decline which is indicated by an early degeneration of cortical and sub-cortical structures. Characterizing those morphological changes can help to understand the disease development and contribute to disease early prediction and prevention. But modeling that can best capture brain structural variability and can be valid in both disease classification and interpretation is extremely challenging. The current study aimed to establish a computational approach for modeling the magnetic resonance imaging (MRI)-based structural complexity of the brain using the framework of hidden Markov models (HMMs) for dementia recognition. Regularity dimension and semi-variogram were used to extract structural features of the brains, and vector quantization method was applied to convert extracted feature vectors to prototype vectors. The output VQ indices were then utilized to estimate parameters for HMMs. To validate its accuracy and robustness, experiments were carried out on individuals who were characterized as non-demented and mild Alzheimer's diseased. Four HMMs were constructed based on the cohort of non-demented young, middle-aged, elder and demented elder subjects separately. Classification was carried out using a data set including both non-demented and demented individuals with a wide age range. The proposed HMMs have succeeded in recognition of individual who has mild Alzheimer's disease and achieved a better classification accuracy compared to other related works using different classifiers. Results have shown the ability of the proposed modeling for recognition of early dementia. The findings from this research will allow individual classification to support the early diagnosis and prediction of dementia. By using the brain MRI-based HMMs developed in our proposed research, it will be more efficient, robust and can be easily used by clinicians as a computer-aid tool for validating imaging bio-markers for early prediction of dementia." @default.
• W2066624552 created "2016-06-24" @default.
• W2066624552 creator A5009439842 @default.
• W2066624552 creator A5040558103 @default.
• W2066624552 date "2013-01-01" @default.
• W2066624552 modified "2023-09-27" @default.
• W2066624552 title "Development of a brain MRI-based hidden Markov model for dementia recognition" @default.
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• W2066624552 doi "https://doi.org/10.1186/1475-925x-12-s1-s2" @default.
• W2066624552 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4028867" @default.
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