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Proceedings Paper

Fast orthogonal search method for modeling nonlinear hemodynamic response in fMRI
Author(s): Xingfeng Li; Jie Tian; Xiaoxiang Wang; Jianping Dai; Lin Ai
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Paper Abstract

This study presents a fast orthogonal search (FOS) method for modeling fMRI time series. Based on the system identification theory, an orthogonalization procedure to model the fMRI time series is described. FOS method does not require equally space data, and can resolve sinusoidal frequencies much more closely than Fourier transform method. After the time series are modeled by means of the FOS, F-test is employed to detect the activation regions. Eight volunteers' data were collected to validate the proposed method. The results demonstrate the feasibility of the proposed method.

Paper Details

Date Published: 30 April 2004
PDF: 8 pages
Proc. SPIE 5369, Medical Imaging 2004: Physiology, Function, and Structure from Medical Images, (30 April 2004); doi: 10.1117/12.536165
Show Author Affiliations
Xingfeng Li, Institute of Automation (China)
Jie Tian, Institute of Automation (China)
Xiaoxiang Wang, Institute of Automation (China)
Jianping Dai, Chinese Capital Univ. of Medical Sciences (China)
Lin Ai, Chinese Capital Univ. of Medical Sciences (China)


Published in SPIE Proceedings Vol. 5369:
Medical Imaging 2004: Physiology, Function, and Structure from Medical Images
Amir A. Amini; Armando Manduca, Editor(s)

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