Estimating Tissue Microstructure Using Diffusion-Weighted Magnetic Resonance Spectroscopy of Brain Metabolites

  • Marco Palombo
Conference paper
Part of the Mathematics and Visualization book series (MATHVISUAL)

Abstract

Diffusion-weighted magnetic resonance spectroscopy (DW-MRS) allows to uniquely characterize the brain tissue in vivo by quantifying the diffusion of brain metabolites. In contrast with water, many brain metabolites are predominantly intracellular, and some metabolites are preferentially found in specific brain cell types, e.g., neurons and glia. Given the microstructural sensitivity of diffusion-encoding filters, investigation of metabolite diffusion properties using DW-MRS can provide exclusive cell and compartment-specific information. Since many developmental processes, such as plasticity and aging, or pathological processes such as neurological diseases are characterized by modulations of specific cellular types and their microstructures, and since water signal is not representative of any specific compartment, metabolite signals can serve as biomarkers with enhanced specificity. Furthermore, since many models and assumptions are used for quantification of water diffusion, metabolite diffusion may serve to generate a-priori information for model selection.

In this chapter, we survey the state-of-the-art methods that have been developed for the advanced analysis of DW-MRS data and discuss the potential relevance of DW-MRS for elucidating brain microstructure in vivo. Some examples are reported and discussed, showing that when accurate data on the diffusion of multiple metabolites is combined with accurate computational and geometrical modelling, DW-MRS can provide unique and accurate cell-specific information on the intracellular structure of brain tissue.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Marco Palombo
    • 1
  1. 1.Centre for Medical Imaging Computing and Department of Computer ScienceUniversity College of LondonLondonUK

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