Statistics and Its Interface

Volume 1 (2008)

Number 1

Fast functional magnetic resonance imaging—a new approach towards neuroimaging

Pages: 13 – 21

DOI: http://dx.doi.org/10.4310/SII.2008.v1.n1.a2

Authors

Zang-Hee Cho (Neuroscience Research Institute, Gachon University of Medicine and Science, Inchon, Korea)

Gary Glover (Department of Radiology, Stanford University, Stanford, Calif., U.S.A.)

Martin A. Lindquist (Department of Statistics, Columbia University, New York)

Lawrence Shepp (Department of Statistics and Biostatistics, Rutgers University, Piscataway, N.J., U.S.A.)

Cun-Hui Zhang (Department of Statistics and Biostatistics, Rutgers University, Piscataway, N.J., U.S.A.)

Abstract

Functional MRI, a powerful method of neuroimaging, is expected to have profound and far-reaching consequences in the understanding of human brain function, a problem of central scientific interest at the present time. However, for higher cognition studies, the $time-resolution$ of present techniques has to be greatly improved. In this paper, we describe a fast functional MRI approach which we have developed, including an echo-volumar imaging sampling scheme, image reconstruction based on prolate-spheroidal kernels, optimality properties of these sampling and image reconstruction methods, and statistical analysis of fast functional MRI data. Results from real experiments are presented to demonstrate the feasibility of our methods.

Keywords

functional MRI, rapid imaging, echo-volumar imaging, single-shot imaging, hemodynamic response, positive rise, negative dip, temporal resolution, prolate-spheroidal wave function, time series, false discovery rate, bootstrap

Full Text (PDF format)