Quantitation of brain tissue changes associated with white matter hyperintensities by diffusion-weighted and magnetization transfer imaging: the LADIS (Leukoaraiosis and Disability in the Elderly) study

Research output: Contribution to journalJournal articleResearchpeer-review

  • Stefan Ropele
  • Alexandra Seewann
  • Alida A Gouw
  • Wiesje M van der Flier
  • Reinhold Schmidt
  • Leonardo Pantoni
  • Domenico Inzitari
  • Timo Erkinjuntti
  • Philip Scheltens
  • Lars O Wahlund
  • Waldemar, Gunhild
  • Hugues Chabriat
  • José Ferro
  • Michael Hennerici
  • John O'Brien
  • Anders Wallin
  • Peter Langhorne
  • Marieke C Visser
  • Frederik Barkhof
  • Franz Fazekas
  • LADIS study group
PURPOSE: To explore the value of diffusion-weighted imaging (DWI) and magnetization transfer imaging (MTI) for the improved detection and quantification of cerebral tissue changes associated with ageing and white matter hyperintensities (WMH). MATERIALS AND METHODS: DWI (n = 340) and MTI (n = 177) were performed in nine centers of the multinational Leukoaraiosis And DISability (LADIS) study investigating the impact of WMH on 65- to 85-year-old individuals without prior disability. We assessed the apparent diffusion coefficient (ADC) and magnetization transfer ratio (MTR) of normal appearing brain tissue (NABT) and within WMH and related them to subjects' age and WHM severity according to the Fazekas score. RESULTS: ADC and MTR values showed a significant inter-site variation, which was stronger for the MTR. After z-transformation multiple regression analysis revealed WMH severity and age as significant predictors of global ADC and MTR changes. Only lesional ADC, but not MTR was related to WMH severity. CONCLUSION: ADC and MTR are both sensitive for age and WMH related changes in NABT. The ADC is more sensitive for tissue changes within WMH and appears to be more robust for multicenter settings.
Original languageEnglish
JournalJournal of Magnetic Resonance Imaging
Volume29
Issue number2
Pages (from-to)268-74
Number of pages6
ISSN1053-1807
DOIs
Publication statusPublished - 2009

Bibliographical note

Keywords: Aged; Aged, 80 and over; Analysis of Variance; Diffusion Magnetic Resonance Imaging; Female; Humans; Imaging, Three-Dimensional; Leukoaraiosis; Magnetic Resonance Imaging; Male; Severity of Illness Index

ID: 19978073