MR perfusion imaging in human brain using the UNFAIR technique

Jody L. Tanabe, Martin Yongbi, Craig Branch, Jan Hrabe, Glyn Johnson, Joseph A. Helpern

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


Pulsed arterial spin labeling magnetic resonance techniques have been developed recently to estimate cerebral blood flow (CBF). Flow-sensitive alternating inversion recovery (FAIR) is one such technique that has been implemented successfully in humans. Un-inverted FAIR (UNFAIR) is an alternative technique in which the flow-sensitive image is acquired following inversion of all spins outside the slice of interest, and the control image is acquired without any spin labeling. This approach is potentially more efficient than FAIR since the UNFAIR control image is entirely flow independent and need only be acquired once. Here, we describe implementation of the sequence on a clinical 1.5 T magnetic resonance system. Both FAIR and UNFAIR perfusion-weighted images were obtained from six normal volunteers. Wash-in/wash-out curves measured in cortical gray and white matter were practically identical for the two techniques, as predicted by our model.

Original languageEnglish (US)
Pages (from-to)761-767
Number of pages7
JournalJournal of Magnetic Resonance Imaging
Issue number6
StatePublished - Jun 1999


  • Cerebral blood flow
  • FAIR
  • Perfusion
  • Transit times

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


Dive into the research topics of 'MR perfusion imaging in human brain using the UNFAIR technique'. Together they form a unique fingerprint.

Cite this