scholarly journals Machine Learning of Functional Magnetic Resonance Imaging Network Connectivity Predicts Substance Abuse Treatment Completion

2018 ◽  
Vol 3 (2) ◽  
pp. 141-149 ◽  
Author(s):  
Vaughn R. Steele ◽  
J. Michael Maurer ◽  
Mohammad R. Arbabshirani ◽  
Eric D. Claus ◽  
Brandi C. Fink ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Machine Learning ◽  
Substance Abuse ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Substance Abuse Treatment ◽  
Network Connectivity ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Abuse Treatment

scholarly journals Application of Structural and Functional Connectome Mismatch for Classification and Individualized Therapy in Alzheimer Disease

2020 ◽  
Vol 8 ◽  
Author(s):  
Huixia Ren ◽  
Jin Zhu ◽  
Xiaolin Su ◽  
Siyan Chen ◽  
Silin Zeng ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Machine Learning ◽  
Magnetic Resonance ◽  
Functional Connectivity ◽  
Alzheimer Disease ◽  
Functional Magnetic Resonance Imaging ◽  
Anterior Cingulate ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Subcortical Structures

While machine learning approaches to analyzing Alzheimer disease connectome neuroimaging data have been studied, many have limited ability to provide insight in individual patterns of disease and lack the ability to provide actionable information about where in the brain a specific patient's disease is located. We studied a cohort of patients with Alzheimer disease who underwent resting state functional magnetic resonance imaging and diffusion tractography imaging. These images were processed, and a structural and functional connectivity matrix was generated using the HCP cortical and subcortical atlas. By generating a machine learning model, individual-level structural and functional anomalies detection and characterization were explored in this study. Our study found that structural disease burden in Alzheimer's patients is mainly focused in the subcortical structures and the Default mode network (DMN). Interestingly, functional anomalies were less consistent between individuals and less common in general in these patients. More intriguing was that some structural anomalies were noted in all patients in the study, namely a reduction in fibers involving parcellations in the right anterior cingulate. Alternately, the functional consequences of connectivity loss were cortical and variable. Integrated structural/functional connectomics might provide a useful tool for assessing AD progression, while few concerns have been made for analyzing the mismatch between these two. We performed a preliminary exploration into a set of Alzheimer disease data, intending to improve a personalized approach to understanding individual connectomes in an actionable manner. Specifically, we found that there were consistent patterns of white matter fiber loss, mainly focused around the DMN and deep subcortical structures, which were present in nearly all patients with clinical AD. Functional magnetic resonance imaging shows abnormal functional connectivity different within the patients, which may be used as the individual target for further therapeutic strategies making, like non-invasive stimulation technology.

scholarly journals A CNN-Based Autoencoder and Machine Learning Model for Identifying Betel-Quid Chewers Using Functional MRI Features

2021 ◽  
Vol 11 (6) ◽  
pp. 809
Author(s):  
Ming-Chou Ho ◽  
Hsin-An Shen ◽  
Yi-Peng Eve Chang ◽  
Jun-Cheng Weng
Keyword(s):  
Magnetic Resonance Imaging ◽  
Machine Learning ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Resting State ◽  
Learning Model ◽  
Betel Quid ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Machine Learning Model

Betel quid (BQ) is one of the most commonly used psychoactive substances in some parts of Asia and the Pacific. Although some studies have shown brain function alterations in BQ chewers, it is virtually impossible for radiologists’ to visually distinguish MRI maps of BQ chewers from others. In this study, we aimed to construct autoencoder and machine-learning models to discover brain alterations in BQ chewers based on the features of resting-state functional magnetic resonance imaging. Resting-state functional magnetic resonance imaging (rs-fMRI) was obtained from 16 BQ chewers, 15 tobacco- and alcohol-user controls (TA), and 17 healthy controls (HC). We used an autoencoder and machine learning model to identify BQ chewers among the three groups. A convolutional neural network (CNN)-based autoencoder model and supervised machine learning algorithm logistic regression (LR) were used to discriminate BQ chewers from TA and HC. Classifying the brain MRIs of HC, TA controls, and BQ chewers by conducting leave-one-out-cross-validation (LOOCV) resulted in the highest accuracy of 83%, which was attained by LR with two rs-fMRI feature sets. In our research, we constructed an autoencoder and machine-learning model that was able to identify BQ chewers from among TA controls and HC, which were based on data from rs-fMRI, and this might provide a helpful approach for tracking BQ chewers in the future.

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