A Task-Frequency-Related Approach for Detecting Activation in Functional MRI
A task-frequency-related method for detecting significant activation patterns in a time series of observations at a single voxel, as measured with functional magnetic resonance imaging (fMRI). is presented in this paper The method involves testing for relations between the task frequencies and the hemodynamic response via non-parametric estimation of the spectral density of the time series and is used to locate the activated areas. For comparison, the correlation coefficients analysis is also introduced. Experimental results demonstrate that the proposed algorithm performs better than correlation coefficients analysis. The proposed algorithm is quite suitable for detecting activation in functional MRI when the stimulus task is presented in periodic sequence.
fMRI task-frequency-related spectral estimation hemodynamics motor control
Lei Zhen Hu Dewen Zhu Wenzhen Xia Liming
Department of Automatic Control, National University ef Defense Technology, Changsha, Hunan 410073, Department of Automatic Control, National University ef Defense Technology, Changsha, Hunan 410073, Department of Radiology, Tong Ji Hospital, Tong Ji Medical School, HuazhongUniv. of Sci. & Tech.,
国际会议
8th International Conference on Neural Information Processing(ICONIP 2001)(第八届国际神经信息处理大会)
上海
英文
478-483
2001-11-14（万方平台首次上网日期，不代表论文的发表时间）