Magnetic resonance spectroscopy of neurodegenerative illness

doi:10.1017/CBO9780511544873.022

21 - Magnetic resonance spectroscopy of neurodegenerative illness

from Part II - Neuroimaging in neurodegeneration

Published online by Cambridge University Press: 04 August 2010

Anthony E. Lang and

Ji-Kyung Choi and

M. Flint Beal: Affiliation:
Cornell University, New York
Anthony E. Lang: Affiliation:
University of Toronto
Albert C. Ludolph: Affiliation:
Universität Ulm, Germany
Bruce G. Jenkins: Affiliation:
Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School
Ji-Kyung Choi: Affiliation:
Department of Radiology, Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital and Harvard Medical School

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Summary

Introduction

Since its introduction for human study in the early 1980s, magnetic resonance (MR) has proven itself an extremely versatile technique for evaluation of many different parameters of anatomic, physiologic, and metabolic interest. The number of phenomena amenable to analysis using magnetic resonance (MR) techniques is increasing every year. This versatility arises from the many different sources of magnetic contrast that can be generated using either endogenous or exogenous contrast, from the versatility of the techniques for manipulation of the nuclear spins that generate the observed signals, and from the extremely safe nature of MR that lends itself well to longitudinal studies and large patient populations.

MR techniques can now evaluate tissue parameters relevant to TCA cycle metabolism, anaerobic glycolysis, ATP levels, blood–brain barrier permeability, macrophage infiltration, cytotoxic edema, spreading depression, cerebral blood flow and volume, and neurotransmitter function. The paramagnetic nature of certain oxidation states of iron leads to the ability to map out brain function using deoxyhemoglobin as an endogenous contrast agent, and also allows for mapping of local tissue iron concentrations. In addition to these metabolic parameters, the number of ways to generate anatomic contrast using MR is also expanding, and in addition to conventional anatomic scans, mapping of axonal fiber tracts can also be performed using the anisotropy of water diffusion. A selective, non-exhaustive, summary of the various parameters of relevance to neurodegeneration (ND) that can be measured using MR techniques is presented in Table 21.1.

Type: Chapter
Information: Neurodegenerative Diseases
Neurobiology, Pathogenesis and Therapeutics
, pp. 301 - 326

DOI: https://doi.org/10.1017/CBO9780511544873.022 [Opens in a new window]

Publisher: Cambridge University Press

Print publication year: 2005

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