Magnetization transfer ratio of white matter hyperintensities in subcortical ischemic vascular dementia

Jody L. Tanabe, Frank Ezekiel, William J. Jagust, Bruce R Reed, David Norman, Norbert Schuff, Michael W. Weiner, Helena Chui, George Fein

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

BACKGROUND AND PURPOSE: In subjects with subcortical ischemic vascular dementia (SIVD), tissue vacuolization, myelin pallor, and demyelination have been found on pathologic examination of white matter signal hyperintensities (WMSH). Magnetization transfer ratio (MTR) values provide a potential measure of compromised white matter integrity. The purpose of this study was to determine if there were differences in MTR of WMSH between subjects with SIVD and cognitively normal healthy control subjects. METHODS: Fifteen subjects with SIVD and 16 control subjects of comparable age and sex were studied. MTR images were coregistered to MR images segmented into tissue classes (gray matter, white matter, CSF, WMSH, and lacunar infarcts). MTR of WMSH was compared across groups and examined by WMSH location, size, and total burden. RESULTS: WMSH burden was greater in SIVD patients than in control subjects (2.4% vs 0.67%). MTR of WMSH did not differ between groups, but MTR of periventricular WMSH was lower in SIVD patients than in control subjects (37.6% vs 39.4%). Even after accounting for covariant effects of lesion burden, there was still a trend toward reduced periventricular WMSH MTR in the group with dementia. There was no correlation between WMSH MTR and WMSH lesion size. CONCLUSION: These findings are consistent with observations that pathologic changes in vascular dementia are most severe in the periventricular white matter and suggest that insight into the pathophysiology of SIVD might be gleaned from studies of the periventricular region.

Original languageEnglish (US)
Pages (from-to)839-844
Number of pages6
JournalAmerican Journal of Neuroradiology
Volume20
Issue number5
StatePublished - 1999

ASJC Scopus subject areas

  • Clinical Neurology
  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

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    Tanabe, J. L., Ezekiel, F., Jagust, W. J., Reed, B. R., Norman, D., Schuff, N., Weiner, M. W., Chui, H., & Fein, G. (1999). Magnetization transfer ratio of white matter hyperintensities in subcortical ischemic vascular dementia. American Journal of Neuroradiology, 20(5), 839-844.