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Incremental Activation Detection for Real-Time fMRI Series Using Robust Kalman Filter
Real-time functional magnetic resonance imaging (rt-fMRI) is a technique that enables us to observe human brain activations in real time. However, some unexpected noises that emerged in fMRI data collecting, such as acute swallowing, head moving and human manipulations, will cause much confusion and...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi Publishing Corporation
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3912890/ https://www.ncbi.nlm.nih.gov/pubmed/24511325 http://dx.doi.org/10.1155/2014/759805 |
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author | Li, Liang Yan, Bin Tong, Li Wang, Linyuan Li, Jianxin |
author_facet | Li, Liang Yan, Bin Tong, Li Wang, Linyuan Li, Jianxin |
author_sort | Li, Liang |
collection | PubMed |
description | Real-time functional magnetic resonance imaging (rt-fMRI) is a technique that enables us to observe human brain activations in real time. However, some unexpected noises that emerged in fMRI data collecting, such as acute swallowing, head moving and human manipulations, will cause much confusion and unrobustness for the activation analysis. In this paper, a new activation detection method for rt-fMRI data is proposed based on robust Kalman filter. The idea is to add a variation to the extended kalman filter to handle the additional sparse measurement noise and a sparse noise term to the measurement update step. Hence, the robust Kalman filter is designed to improve the robustness for the outliers and can be computed separately for each voxel. The algorithm can compute activation maps on each scan within a repetition time, which meets the requirement for real-time analysis. Experimental results show that this new algorithm can bring out high performance in robustness and in real-time activation detection. |
format | Online Article Text |
id | pubmed-3912890 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Hindawi Publishing Corporation |
record_format | MEDLINE/PubMed |
spelling | pubmed-39128902014-02-09 Incremental Activation Detection for Real-Time fMRI Series Using Robust Kalman Filter Li, Liang Yan, Bin Tong, Li Wang, Linyuan Li, Jianxin Comput Math Methods Med Research Article Real-time functional magnetic resonance imaging (rt-fMRI) is a technique that enables us to observe human brain activations in real time. However, some unexpected noises that emerged in fMRI data collecting, such as acute swallowing, head moving and human manipulations, will cause much confusion and unrobustness for the activation analysis. In this paper, a new activation detection method for rt-fMRI data is proposed based on robust Kalman filter. The idea is to add a variation to the extended kalman filter to handle the additional sparse measurement noise and a sparse noise term to the measurement update step. Hence, the robust Kalman filter is designed to improve the robustness for the outliers and can be computed separately for each voxel. The algorithm can compute activation maps on each scan within a repetition time, which meets the requirement for real-time analysis. Experimental results show that this new algorithm can bring out high performance in robustness and in real-time activation detection. Hindawi Publishing Corporation 2014 2014-01-06 /pmc/articles/PMC3912890/ /pubmed/24511325 http://dx.doi.org/10.1155/2014/759805 Text en Copyright © 2014 Liang Li et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Li, Liang Yan, Bin Tong, Li Wang, Linyuan Li, Jianxin Incremental Activation Detection for Real-Time fMRI Series Using Robust Kalman Filter |
title | Incremental Activation Detection for Real-Time fMRI Series Using Robust Kalman Filter |
title_full | Incremental Activation Detection for Real-Time fMRI Series Using Robust Kalman Filter |
title_fullStr | Incremental Activation Detection for Real-Time fMRI Series Using Robust Kalman Filter |
title_full_unstemmed | Incremental Activation Detection for Real-Time fMRI Series Using Robust Kalman Filter |
title_short | Incremental Activation Detection for Real-Time fMRI Series Using Robust Kalman Filter |
title_sort | incremental activation detection for real-time fmri series using robust kalman filter |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3912890/ https://www.ncbi.nlm.nih.gov/pubmed/24511325 http://dx.doi.org/10.1155/2014/759805 |
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