Functional neuroimaging: fundamental principles and clinical applications

Nishanth Khanna, Wilson Altmeyer, Jiachen Zhuo, Andrew Steven

Research output: Contribution to journalReview article

Abstract

Functional imaging modalities, such as functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI), are rapidly changing the scope and practice of neuroradiology. While these modalities have long been used in research, they are increasingly being used in clinical practice to enable reliable identification of eloquent cortex and white matter tracts in order to guide treatment planning and to serve as a diagnostic supplement when traditional imaging fails. An understanding of the scientific principles underlying fMRI and DTI is necessary in current radiological practice. fMRI relies on a compensatory hemodynamic response seen in cortical activation and the intrinsic discrepant magnetic properties of deoxyand oxyhemoglobin. Neuronal activity can be indirectly visualized based on a hemodynamic response, termed neurovascular coupling. fMRI demonstrates utility in identifying areas of cortical activation (i.e., task-based activation) and in discerning areas of neuronal connectivity when used during the resting state, termed resting state fMRI. While fMRI is limited to visualization of gray matter, DTI permits visualization of white matter tracts through diffusion restriction along different axes. We will discuss the physical, statistical and physiological principles underlying these functional imaging modalities and explore new promising clinical applications.

Original languageEnglish (US)
Pages (from-to)87-96
Number of pages10
JournalNeuroradiology Journal
Volume28
Issue number2
DOIs
StatePublished - Apr 1 2015
Externally publishedYes

Fingerprint

Functional Neuroimaging
Magnetic Resonance Imaging
Diffusion Tensor Imaging
Hemodynamics
Oxyhemoglobins
Research

Keywords

  • Diffusion
  • DTI
  • FMRI
  • Functional
  • Tensor

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology

Cite this

Functional neuroimaging : fundamental principles and clinical applications. / Khanna, Nishanth; Altmeyer, Wilson; Zhuo, Jiachen; Steven, Andrew.

In: Neuroradiology Journal, Vol. 28, No. 2, 01.04.2015, p. 87-96.

Research output: Contribution to journalReview article

Khanna, Nishanth ; Altmeyer, Wilson ; Zhuo, Jiachen ; Steven, Andrew. / Functional neuroimaging : fundamental principles and clinical applications. In: Neuroradiology Journal. 2015 ; Vol. 28, No. 2. pp. 87-96.
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