Magnetization transfer and diffusion tensor MR imaging of the optic radiations and calcarine cortex from patients with Leber's hereditary optic neuropathy

Research output: Contribution to journalArticle

Abstract

Optic nerve abnormalities are easily detectable in patients with Leber's hereditary optic neuropathy (LHON), using magnetic resonance imaging (MRI). However, the presence of structural changes in the optic radiations and calcarine cortex of these patients is still an unresolved issue. In this study, we obtained magnetization transfer (MT) and diffusion tensor (DT) MRI to investigate the integrity of these structures in patients with LHON. Dual echo, MT- and DT-MRI scans of the brain were obtained from 10 men with LHON and 10 healthy sex- and age-matched controls. After image co-registration, we obtained MT ratio (MTR), average diffusivity (D̄) and fractional anisotropy (FA) maps. MTR, D̄ and FA values for the white matter of the optic radiations and MTR and D̄ values for the calcarine cortex were obtained using a region of interest (ROI) analysis. No macroscopic abnormalities were detected in any of the scans from LHON patients and controls. No statistically significant differences of MTR, D̄ or FA values were found for any of the regions studied in LHON patients and healthy controls. Our results suggest that, in patients with LHON, the optic radiations and the calcarine cortex are spared from structural damage, both at a macroscopic and a microscopic level.

Original languageEnglish
Pages (from-to)33-36
Number of pages4
JournalJournal of the Neurological Sciences
Volume188
Issue number1-2
DOIs
Publication statusPublished - Jul 15 2001

Keywords

  • Calcarine cortex
  • Diffusion tensor imaging
  • Leber's hereditary optic neuropathy
  • Magnetization transfer imaging
  • Optic radiations

ASJC Scopus subject areas

  • Ageing
  • Clinical Neurology
  • Surgery
  • Developmental Neuroscience
  • Neurology
  • Neuroscience(all)

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