A hybrid approach for compressive neural activity detection with functional MR images

In this paper, we present a framework for neural activity detection using fMRI data, based on both statistical data analysis (data-driven) and graphical information modeling (model-based). The data-driven approaches do rough prediction when an extraordinary amount of neural activities arise. By prop...

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Published in:Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference Vol. 2009; pp. 4787 - 4790
Main Authors: Li, Chuan, Hao, Qi, Guo, Weihong, Hu, Fei
Format: Conference Proceeding Journal Article
Language:English
Published: United States IEEE 01.01.2009
Subjects:
Bayesian methods
Brain - physiology
Brain Mapping
Cluster Analysis
Computational efficiency
Data analysis
Humans
Hypothalamus - physiology
Image coding
Linear predictive coding
Magnetic Resonance Imaging - methods
Models, Theoretical
Nonlinear filters
Predictive models
Signal analysis
Signal to noise ratio
Volume measurement
ISSN:1094-687X, 1557-170X, 2375-7477
Online Access:Get full text
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Summary:In this paper, we present a framework for neural activity detection using fMRI data, based on both statistical data analysis (data-driven) and graphical information modeling (model-based). The data-driven approaches do rough prediction when an extraordinary amount of neural activities arise. By proper exploration of spatial, temporal, inter-subject correlations, the model-based approaches can provide more insights to details, and physiological meaning from high data volume, low signal-to-noise ratio (SNR) fMRI measurements. Through temporal cluster analysis (TCA), matched filtering, linear predictive coding (LPC), and variational Bayesian Gaussian mixture modeling (VBGMM), the temporal fMRI signals are converted into event prototypes associated with three neural statuses: activation, deactivation, and normality. As a result, the high volume fMRI data generated from multiple subjects can be statistically modeled as coupled finite-state sequences. Based on the graphical-model representation, the neural activities captured through fMRI can be classified and detected at reduced computational cost. The whole framework consists of three components: 1) image enhancement, event prediction and capture; 2) event feature extraction and modeling; and 3) graphical model based Bayesian inference. The experiment results demonstrate the advantages of the proposed hybrid, compressive signal processing approach in terms of computational cost and robustness against inter-subject variability as well as various artifacts.
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ISSN:1094-687X
1557-170X
2375-7477
DOI:10.1109/IEMBS.2009.5334208