Phase‐contrast MR angiography with reduced acquisition time: New concepts in sequence design

Richard Hausmann, Jonathan S. Lewin, Gerhard Laub

Research output: Contribution to journalArticle

Abstract

A new acquisition scheme for three‐dimensional (3D) phase‐contrast MR angiography reduces by 33% the measurement time for a data set sensitive to flow in all three orthogonal directions. Background suppression is achieved by acquiring a flow‐compensated data set and three data sets flow encoded in the three orthogonal directions, with subsequent complex subtraction. The data are acquired in an interleaved fashion, eliminating misregistration artifacts due to patient motion between measurements sensitive to different flow directions. A standard maximum‐intensity‐projection algorithm is applied to the combined 3D data set to obtain angiographic projections sensitive to all three orthogonal flow directions. The theory and implementation of the method are described and examples of its application to the intracranial and abdominal circulation are provided.

Original languageEnglish (US)
Pages (from-to)415-422
Number of pages8
JournalJournal of Magnetic Resonance Imaging
Volume1
Issue number4
DOIs
StatePublished - Jan 1 1991

Keywords

  • Blood vessels, MR studies, 17.1214, 96.1214
  • Image display
  • Image processing
  • Phase‐contrast imaging
  • Physics
  • Pulse sequences
  • Three‐dimensional imaging
  • Vascular studies

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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