Physiological origin of low-frequency drift in blood oxygen level dependent (BOLD) functional magnetic resonance imaging (fMRI).

@article{Yan2009PhysiologicalOO,
  title={Physiological origin of low-frequency drift in blood oxygen level dependent (BOLD) functional magnetic resonance imaging (fMRI).},
  author={Lirong Yan and Yan Zhuo and Yongquan Ye and Sharon X Xie and Jing An and Geoffrey K. Aguirre and Jiongjiong Wang},
  journal={Magnetic resonance in medicine},
  year={2009},
  volume={61 4},
  pages={819-27}
}
We investigated the biophysical mechanism of low-frequency drift in blood-oxygen-level-dependent (BOLD) functional magnetic resonance imaging (fMRI) (0.00-0.01 Hz), by exploring its spatial distribution, dependence on imaging parameters, and relationship with task-induced brain activation. Cardiac and respiratory signals were concurrently recorded during MRI scanning and subsequently removed from MRI data. It was found that the spatial distribution of low-frequency drifts in human brain… CONTINUE READING
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