Chapter

Hardware for functional MRI

Gary H. Glover

in Functional Magnetic Resonance Imaging

Published in print November 2001 | ISBN: 9780192630711
Published online March 2012 | e-ISBN: 9780191724770 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780192630711.003.0005
Hardware for functional MRI

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Functional neuroimaging places strong demands on the MR imaging hardware because of the need for rapid acquisition, high signal-to-noise ratio and exceptional system stability. This chapter discusses the requirements for functional magnetic resonance imaging (fMRI) hardware, describing MR imaging hardware optimized for fMRI and discussing the safety implications of high magnetic fields. The choice of field strength for routine cognitive neuroscience is influenced by numerous factors. The chapter also discusses biological considerations for fast gradient switching that can induce magneto stimulation effects in humans by creating local electric potentials. The study gives an overview of gradient coils, shows a schematic diagram of transverse gradients and the longitudinal gradient, and discusses parameters that are important in the design of gradient coils. Future developments in MRI hardware are also addressed.

Keywords: functional neuroimaging; gradient coils; fMRI hardware; electric potentials; magneto stimulation

Chapter.  8063 words.  Illustrated.

Subjects: Neuroscience

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