Elsevier

NeuroImage

Volume 62, Issue 2, 15 August 2012, Pages 632-636
NeuroImage

Review
The NIH experience in first advancing fMRI

https://doi.org/10.1016/j.neuroimage.2011.07.074Get rights and content

Abstract

The introduction of functional MRI at NIH in 1992 was the outcome of research goals first formulated by Turner in 1983. Between 1988 and 1990, Turner worked at NIH on actively-shielded gradient coils and the implementation of EPI-based techniques, especially diffusion-weighted EPI. His work on hypoxia in cat brain in 1990 directly inspired Ken Kwong's demonstration of BOLD contrast in humans at MGH in May 1991. Turner collaborated actively with this MGH team, the first group to map entirely noninvasively human brain activity due to visual stimulation. He introduced BOLD fMRI at NIH in February 1992. This paper reviews the steps that led up to BOLD EPI, and Turner's initial applications of BOLD fMRI at NIH.

Highlights

► Motivation for investigation of BOLD contrast. ► Value of EPI data acquisition. ► Detailed chronology of first experiments. ► Response of NIH neuroscientists to successful BOLD fMRI.

Section snippets

Scientific context

My background is a BA degree in physics and mathematics, and a PhD in physics. After three years pursuing research into liquid metals and then liquid crystals as a physics postdoctoral fellow at the Cavendish Laboratory, Cambridge University, I left in 1975 to study social anthropology for two years at University College London. There I was taught that Western concepts of social behavior had little place in the interpretation of other cultures, which were considered to originate independently

Chronology

The original notebooks containing the key dates in this chronology between 1986 and 1993 are available in my personal library or on file at NIH.

The chronology is as follows:

  • 1978: Turner read Lassen and Ingvar's Scientific American article on 133Xe imaging of brain function.

  • 1982: Turner was introduced to MRI at Edinburgh Royal Infirmary, Scotland.

  • 1983: Turner viewed EPI movies of beating infant heart in Peter Mansfield's lab, Nottingham. Turner proposed EPI movies of brain function.

  • 1986, 14th

History of BOLD at NIH

Joining NIH in 1988, I started work immediately with Denis Le Bihan, in the hopes that perfusion imaging using magnetic field gradient labeling of rapidly moving spins (IVIM) could identify regionally specific changes in cerebral blood flow (CBF). I implemented the technique of diffusion-weighted EPI, using a z-axis head gradient coil designed by me and built at NIH, on the 1.5 T GE Signa scanner at NIH. This was done with the help of James McFall, and the GE R&D engineers Joe Maier and Bob

Perspective

BOLD fMRI, using EPI data acquisition, is now the most common technique for mapping human brain activity. BOLD imaging unquestionably arose from observations in rat brain made by Seiji Ogawa, when he was a researcher at Bell Laboratories in New Jersey. He showed that gradient echo imaging, at the very high field strength of 7 Tesla, showed variations of visibility of rat brain veins that depended on the oxygenation level of the blood (Ogawa et al., 1990a, Ogawa et al., 1990b).

The MRI technique

References (37)

  • P.T. Fox et al.

    Focal physiological uncoupling of cerebral blood flow and oxidative metabolism during somatosensory stimulation in human subjects

    Proc. Natl. Acad. Sci. U. S. A.

    (1986)
  • J. Frahm et al.

    Dynamic MR imaging of human brain oxygenation during rest and photic stimulation

    J. Magn. Reson. Imaging

    (1992)
  • K.J. Friston et al.

    Analysis of functional MRI time series

    Hum. Brain Mapp.

    (1994)
  • R.D. Hoge et al.

    Linear coupling between cerebral blood flow and oxygen consumption in activated human cortex

    Proc. Natl. Acad. Sci. U. S. A.

    (1999)
  • P. Jezzard et al.

    Comparison of EPI gradient-echo contrast changes in cat brain caused by respiratory challenges with direct simultaneous evaluation of cerebral oxygenation via a cranial window

    NMR Biomed.

    (1994)
  • A. Karni et al.

    Functional MRI evidence for adult motor cortex plasticity during motor skill learning

    Nature

    (1995)
  • A. Karni et al.

    The acquisition of skilled motor performance: fast and slow experience-driven changes in primary motor cortex

    Proc. Natl. Acad. Sci. U. S. A.

    (1998)
  • K.K. Kwong et al.

    Dynamic magnetic resonance imaging of human brain activity during primary sensory stimulation

    Proc. Natl. Acad. Sci. U. S. A.

    (1992)
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