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Improved perfusion quantification in FAIR imaging by offset correction

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

  • K Sidaros, Department of Mathematical Modelling, Technical University of Denmark, Lyngby, Denmark. karams@magnet.drcmr.dk
  • ,
  • Irene Klærke Andersen
  • H Gesmar
  • ,
  • E Rostrup
  • ,
  • H B Larsson

Perfusion quantification using pulsed arterial spin labeling has been shown to be sensitive to the RF pulse slice profiles. Therefore, in Flow-sensitive Alternating-Inversion Recovery (FAIR) imaging the slice selective (ss) inversion slab is usually three to four times thicker than the imaging slice. However, this reduces perfusion sensitivity due to the increased transit delay of the incoming blood with unperturbed spins. In the present article, the dependence of the magnetization on the RF pulse slice profiles is inspected both theoretically and experimentally. A perfusion quantification model is presented that allows the use of thinner ss inversion slabs by taking into account the offset of RF slice profiles between ss and nonselective inversion slabs. This model was tested in both phantom and human studies. Magn Reson Med 46:193-197, 2001.

Original languageEnglish
JournalMagnetic Resonance in Medicine
Volume46
Issue1
Pages (from-to)193-7
Number of pages5
ISSN0740-3194
Publication statusPublished - Jul 2001
Externally publishedYes

    Research areas

  • Adult, Brain/anatomy & histology, Humans, Magnetic Resonance Imaging/methods, Phantoms, Imaging, Spin Labels

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