Additive global cerebral blood flow normalization in arterial spin labeling perfusion imaging

Stephanie B. Stewart, Jonathan M. Koller, Meghan C. Campbell, Joel S. Perlmutter, Kevin J. Black

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

To determine how different methods of normalizing for global cerebral blood flow (gCBF) affect image quality and sensitivity to cortical activation, pulsed arterial spin labeling (pASL) scans obtained during a visual task were normalized by either additive or multiplicative normalization of modal gCBF. Normalization by either method increased the statistical significance of cortical activation by a visual stimulus. However, image quality was superior with additive normalization, whether judged by intensity histograms or by reduced variability within gray and white matter.

Original languageEnglish
Article numbere834
JournalPeerJ
Volume2015
Issue number3
DOIs
StatePublished - Jan 1 2015

Keywords

  • ASL
  • Arterial spin labeling
  • Cerebral blood flow
  • Cerebral blood flow measurement
  • FMRI
  • Functional magnetic resonance imaging
  • Parkinson's disease

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