Iron deposition in multiple sclerosis lesions measured by susceptibility-weighted imaging filtered phase: A case control study

Jesper Hagemeier, Mari Heininen-Brown, Guy U. Poloni, Niels Bergsland, Christopher R. Magnano, Jacqueline Durfee, Cheryl Kennedy, Ellen Carl, Bianca Weinstock-Guttman, Michael G. Dwyer, Robert Zivadinov

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To investigate phase lesions identified on susceptibility-weighted imaging (SWI)-filtered phase images in patients with multiple sclerosis (MS), clinically isolated syndrome (CIS) and healthy controls (HC). To relate phase lesion characteristics to other clinical and MRI outcomes. Materials and Methods: 95 relapsing-remitting (RR), 40 secondary-progressive (SP) MS patients, as well as 19 CIS patients and 49 age- and sex-matched HC, were scanned on a 3T scanner. Phase-, T1-, and T2-lesion characteristics were determined. Overlap of T1- and T2-weigthed imaging (WI) lesions with phase lesions (T1P and T2P), as well as brain atrophy outcomes, was assessed. Results: MS patients showed significantly greater numbers and larger volume of phase lesions, compared with HC (P <0.001). 23.6% of T2 lesions overlapped with phase lesions, whereas the same figure for T1 lesions was 37.3%. Conversely, 33.4% and 69.7% of phase lesions were not visible on T2- or T1-WI, respectively. Phase, T1P and T2P lesions were not related to clinical outcomes, but phase lesions were related to ventricular enlargement. Conclusion: Phase lesions were present in both MS and CIS patients, and showed partial overlap with lesions observed using conventional MRI. The role of phase lesions in clinical progression remains unclear and should be further explored.

Original languageEnglish
Pages (from-to)73-80
Number of pages8
JournalJournal of Magnetic Resonance Imaging
Volume36
Issue number1
DOIs
Publication statusPublished - Jul 2012

Keywords

  • brain atrophy
  • iron deposition
  • multiple sclerosis
  • phase imaging
  • phase lesions
  • susceptibility-weighted imaging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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