Contrast-enhanced MR angiography of the carotid bifurcation

Frank R. Korosec*, Patrick A. Turski, Timothy J. Carroll, Charles A. Mistretta, Thomas M. Grist

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

With contrast-enhanced MR angiographic techniques, a T1-shortening contrast agent ts injected into the blood stream. Imaging during the first pass of the contrast agent permits acquisition of a high-contrast MR angiogram. Scan parameters such as flip angle, repetition time, echo time, and scan duration, and injection parameters, such as dose and rate, must be carefully chosen to achieve maximum contrast between blood vessels and stationary tissues. A critical parameter affecting image quality is the timing of the acquisition relative to the injection. If the collection of the center of k-space does not coincide with peak arterial concentration, artifacts, reduced SNR, and venous enhancement may result. Several techniques have been developed to address the timing issue. Post-processing techniques such as subtracting a pre-contrast image from a post-contrast angiogram can be used to improve image quality. Intravascular contrast agents that may also lead to improved image quality are currently being developed.

Original languageEnglish (US)
Pages (from-to)317-325
Number of pages9
JournalJournal of Magnetic Resonance Imaging
Volume10
Issue number3
DOIs
StatePublished - Sep 1999

Keywords

  • Carotid artery imaging
  • Contrast agents
  • Contrast-enhanced MR angiography
  • MR angiography
  • Magnetic resonance imaging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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