Rician distributed functional MRI: Asymptotic power analysis of likelihood ratio tests for activation detection

@article{Noh2010RicianDF,
  title={Rician distributed functional MRI: Asymptotic power analysis of likelihood ratio tests for activation detection},
  author={Joonki Noh and Victor Solo},
  journal={2010 IEEE International Conference on Acoustics, Speech and Signal Processing},
  year={2010},
  pages={477-480}
}
Since voxel time courses in functional magnetic resonance imaging (fMRI) are mostly produced from complex-valued data by taking the magnitudes, they obey Rician distributions, which can be approximated as Gaussian distributions only when signal-to-noise ratios (SNRs) are high. In this paper, we derive the asymptotic power of our recently developed activation detection statistic for Rician fMRI. The analysis shows that the asymptotic power is dependent only on the ratios of signal parameters to… CONTINUE READING