Accession Number : AD1008556

Title :   Diagnosing Autism Spectrum Disorder through Brain Functional Magnetic Resonance Imaging

Descriptive Note : Technical Report,01 Sep 2014,24 Mar 2016

Corporate Author : Air Force Institute of Technology WPAFB United States

Personal Author(s) : Palko,Kyle A

Full Text :

Report Date : 01 Mar 2016

Pagination or Media Count : 102

Abstract : Autism spectrum disorder (ASD) is a neurodevelopmental condition that can be debilitating to social functioning. Previous functional Magnetic Resonance Imaging (fMRI) classification studies have included only small subject sample sizes (n 50) and have seen high classification accuracy. The recent release of the Autism Brain Imaging Data Exchange (ABIDE) provides fMRI data for over 1,100 subjects. In our research, we derive a subject's functional network connectivity (FNC) from their fMRI data and develop a regularized logistic classifier to determine whether a subject has autism. We obtained up to 65% classification accuracy, similar to other studies using the ABIDE dataset, suggesting that generalizing a classifier over a large number of subjects is much more difficult than smaller studies. The connectivity among several brain regions of ASD subjects were highlighted in the model as abnormal compared to the control subjects which potentially warrants future investigations about how these regions affect ASD. Although the classification accuracy was lower than what could be considered as clinically applicable, this research contributes to the continuing development of an automated classifier for diagnosing autism.

Descriptors :   theses , brain , magnetic resonance imaging , mental disorders

Distribution Statement : APPROVED FOR PUBLIC RELEASE