Representation of strong baseline contributions in 1H MR spectra

Brian J. Soher, Karl Young, Andrew A. Maudsley

Research output: Contribution to journalArticle

46 Scopus citations

Abstract

A comparison is made between two optimization procedures and two data models for automated analysis of in vivo proton MR spectra of brain, typical of that obtained using MR spectroscopic imaging at 1.5 Tesla. First, a shift invariant wavelet filter is presented that provides improved performance over a conventional wavelet filter method for characterizing smoothly varying baseline signals. Next, two spectral fitting methods are described' an iterative spectral analysis method that alternates between optimizing a parametric description of metabolite signals and nonparametric characterization of baseline contributions, and a single-pass method that optimizes a complete spectral and baseline model. Both methods are evaluated using wavelet and spline models of the baseline function. Results are shown for Monte Carlo simulations of data representative of both long and short TE, in vivo 1H acquisitions.

Original languageEnglish (US)
Pages (from-to)966-972
Number of pages7
JournalMagnetic Resonance in Medicine
Volume45
Issue number6
DOIs
StatePublished - Jun 9 2001
Externally publishedYes

    Fingerprint

Keywords

  • Baselines
  • In vivo MRS
  • Parametric spectral analysis
  • Splines
  • Wavelets

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this