A comparison of rapid-scanning X-ray fluorescence mapping and magnetic resonance imaging to localize brain iron distribution

Eur J Radiol. 2008 Dec;68(3 Suppl):S109-13. doi: 10.1016/j.ejrad.2008.04.048. Epub 2008 Jul 16.

Abstract

The clinical diagnosis of many neurodegenerative disorders relies primarily or exclusively on observed behaviors rather than measurable physical tests. One of the hallmarks of Alzheimer disease (AD) is the presence of amyloid-containing plaques associated with deposits of iron, copper and/or zinc. Work in other laboratories has shown that iron-rich plaques can be seen in the mouse brain in vivo with magnetic resonance imaging (MRI) using a high-field strength magnet but this iron cannot be visualized in humans using clinical magnets. To improve the interpretation of MRI, we correlated iron accumulation visualized by X-ray fluorescence spectroscopy, an element-specific technique with T1, T2, and susceptibility weighted MR (SWI) in a mouse model of AD. We show that SWI best shows areas of increased iron accumulation when compared to standard sequences.

Publication types

  • Comparative Study
  • Evaluation Study
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Algorithms
  • Alzheimer Disease / diagnostic imaging*
  • Alzheimer Disease / metabolism*
  • Animals
  • Brain / diagnostic imaging*
  • Brain / metabolism*
  • Brain / pathology
  • Imaging, Three-Dimensional / methods
  • Iron / analysis*
  • Magnetic Resonance Imaging / methods*
  • Mice
  • Mice, Transgenic
  • Radiographic Image Enhancement / methods
  • Radiographic Image Interpretation, Computer-Assisted / methods
  • Refractometry / methods
  • Reproducibility of Results
  • Sensitivity and Specificity
  • Spectrometry, X-Ray Emission / methods*
  • Tissue Distribution
  • Tomography, X-Ray / methods*

Substances

  • Iron