Optimal experimental designs for fmri via circulant biased weighing designs

Ching Shui Cheng, Ming-Hung Kao

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Functional magnetic resonance imaging (fMRI) technology is popularly used in many fields for studying how the brain reacts to mental stimuli. The identification of optimal fMRI experimental designs is crucial for rendering precise statistical inference on brain functions, but research on this topic is very lacking. We develop a general theory to guide the selection of fMRI designs for estimating a hemodynamic response function (HRF) that models the effect over time of the mental stimulus, and for studying the comparison of two HRFs. We provide a useful connection between fMRI designs and circulant biased weighing designs, establish the statistical optimality of some well-known fMRI designs and identify several new classes of fMRI designs. Construction methods of high-quality fMRI designs are also given.

Original languageEnglish (US)
Pages (from-to)2565-2587
Number of pages23
JournalAnnals of Statistics
Volume43
Issue number6
DOIs
StatePublished - Dec 1 2015

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Keywords

  • Circulant orthogonal array
  • Design efficiency
  • Hadamard matrix
  • Hemodynamic response function
  • M-sequence

ASJC Scopus subject areas

  • Statistics and Probability
  • Statistics, Probability and Uncertainty

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