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Localization of Brain Activity using Functional Magnetic Resonance Imaging

  • Rainer Goebel
Part of the Medical Radiology book series (MEDRAD)

Abstract

Magnetic resonance imaging (MRI) is based on magnetic excitation of body tissue and the reception of returned electromagnetic signals from the body. Excitation induces phase-locked precession of protons with a frequency proportional to the strength of the surrounding magnetic field as described by the Larmor equation. This fact can be exploited for spatial encoding by applying magnetic field gradients along spatial dimensions on top of the strong static magnetic field of the scanner. The obtained frequency-encoded information for each slice is accumulated in two-dimensional κ space which can be transformed into image space by Fourier analysis.

Keywords

fMRI Data Echo Planar Imaging Anterior Commissure Magnetic Resonance Image Signal Radio Frequency Pulse 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Rainer Goebel
    • 1
  1. 1.Department of Cognitive NeuroscienceMaastricht UniversityMaastrichtThe Netherlands

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