Simultaneous oxygenation and perfusion imaging study of functional activity in primary visual cortex at different visual stimulation frequency: Quantitative correlation between BOLD and CBF changes

Xiao-Hong Zhu, Seong Gi Kim, Peter Andersen, Seiji Ogawa, Kamil Ugurbil, Wei Chen

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

A relationship between regional cerebral blood flow (CBF) and blood oxygenation level dependent (BOLD) changes in the primary visual cortex (V1) at varied visual stimulation frequency has been examined quantitatively using the multislice FAIR technique. A linear correlation in the common activation areas between functional BOLD and CBF maps was observed. This supports the hypothesis that the task-stimulated BOLD changes in microvasculature are correlated with the CBF changes that presumably reflect the degree of neuronal activity. The linear correlation coefficients for intrasubject comparisons are more significant than those for intersubject comparisons. This suggests that using intrasubject comparisons for quantitative studies of neuronal activity related to different task stimuli and task performances should be more reliable than using intersubject comparisons.

Original languageEnglish (US)
Pages (from-to)703-711
Number of pages9
JournalMagnetic resonance in medicine
Volume40
Issue number5
DOIs
StatePublished - Nov 1998

Keywords

  • Oxygenation
  • Perfusion
  • Visual cortex
  • fMRI

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