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  The basics of functional Magnetic Resonance Imaging

Deichmann, R., Nöth, U., & Weiskopf, N. (2010). The basics of functional Magnetic Resonance Imaging. In C. Mulert, & L. Lemieux (Eds.), EEG - fMRI (pp. 39-62). Berlin: Springer. doi:10.1007/978-3-540-87919-0_3.

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 Creators:
Deichmann, Ralf1, Author
Nöth, Ulrike1, Author
Weiskopf, Nikolaus1, Author           
Affiliations:
1External Organizations, ou_persistent22              

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Free keywords: Cerebral blood flow; Cerebral blood volume; Arterial spin labelling; Echo planar image; Larmor frequency
 Abstract: In magnetic resonance imaging (MRI), the signal that is measured usually arises from the nuclei of the tissue’s hydrogen atoms (i.e. protons). A proton possesses a physical property, its spin, which behaves roughly speaking like a compass needle: each spin has a small magnetic dipole moment and aligns in an external magnetic field. If tissue is brought into the strong magnetic field inside the magnetic resonance (MR) scanner bore, spins will align either antiparallel or parallel to the magnetic field B. At the field strengths relevant here, a tiny majority of the spins assume the latter alignment and their magnetic moments add up, giving rise to a net macroscopic magnetisation M which is parallel to B, representing a state of equilibrium (Fig. 1, left). Thus, the existence of this magnetisation inside the magnetic field is an indicator of the presence of protons, and the measurement of M with a certain spatial resolution can be used to construct a proton image.

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Language(s): eng - English
 Dates: 2009-09-062010
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1007/978-3-540-87919-0_3
 Degree: -

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Title: EEG - fMRI
Source Genre: Book
 Creator(s):
Mulert, Christoph1, Editor
Lemieux, Louis1, Editor
Affiliations:
1 External Organizations, ou_persistent22            
Publ. Info: Berlin : Springer
Pages: XXIII, 539 S. Volume / Issue: - Sequence Number: - Start / End Page: 39 - 62 Identifier: ISBN: 978-3-540-87918-3
ISBN: 978-3-540-87919-0
DOI: 10.1007/978-3-540-87919-0