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Spatio-temporal identification of hemodynamics in fMRI: A data-driven approach
Yan, LR; Hu, DW; Zhou, ZT; Liu, YD; Yang, GZ; Jiang, T
2004
Source PublicationMEDICAL IMAGING AND AUGMENTED REALITY, PROCEEDINGS
ISSN0302-9743
SubtypeArticle
Volume3150Pages:213-220
AbstractThis paper presents a new data-driven method to identify the spatial and temporal characteristics of the cerebral hemodynamics in functional magnetic resonance imaging (fMRI). The experiments are in block design paradigm and the scans in task blocks are investigated in a sequential manner. Spatial evolvement of the activated regions along with the time-course are demonstrated. The time series of each region is predicated as the convolution of the stimuli with the hemodynamic response function (HRF) formulated as the sum of two gamma, functions. The predicted time series is fitted to the actual one by using a nonlinear least-squares procedure to estimate the HRF parameters. Analyses on empirical fMRI datasets exhibit obviously the spatial and temporal dispersion of hemodynamics.
Indexed ByISTP ; SCI
Language英语
WOS IDWOS:000223567700026
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.psych.ac.cn/handle/311026/13922
Collection中国科学院心理研究所回溯数据库(1956-2010)
Affiliation1.Natl Univ Def Technol, Dept Automat Control, Changsha 410073, Hunan, Peoples R China
2.Chinese Acad Sci, Key Lab Mental Hlth, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Yan, LR,Hu, DW,Zhou, ZT,et al. Spatio-temporal identification of hemodynamics in fMRI: A data-driven approach[J]. MEDICAL IMAGING AND AUGMENTED REALITY, PROCEEDINGS,2004,3150:213-220.
APA Yan, LR,Hu, DW,Zhou, ZT,Liu, YD,Yang, GZ,&Jiang, T.(2004).Spatio-temporal identification of hemodynamics in fMRI: A data-driven approach.MEDICAL IMAGING AND AUGMENTED REALITY, PROCEEDINGS,3150,213-220.
MLA Yan, LR,et al."Spatio-temporal identification of hemodynamics in fMRI: A data-driven approach".MEDICAL IMAGING AND AUGMENTED REALITY, PROCEEDINGS 3150(2004):213-220.
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