Artifacts from pulsatile flow in MR imaging

W. H. Perman, P. R. Moran, R. A. Moran, Matthew A Bernstein

Research output: Contribution to journalArticle

51 Scopus citations

Abstract

Previous investigator have examined the effect of blood flow on the apparent blood vessel signal intensity. These studies reported flow brightening and darkening effects within vessels. In this paper we have investigated another type of flow artifact, which originates from the pulsatile nature of blood flow. These flow artifacts have characteristic bright and dark 'ghosting' patterns which appear close to small vessels, usually arteries, which are bright in slow flow. Similar to the amplitude-of-motion artifacts caused by patient motion (e.g., breathing and cardiac motion) and ghosting artifacts due to pulsatile flow are best characterized as frequency modulated spectral sidebands. The pulsatile artifacts can have both dark and bright structures and usually appear close to the 'moving' vessel that generates the artifact. In this paper we present a study of the chief features of these pulsatile flow artifacts, and we develop a theoretical description of their origins in terms of 'accidental' velocity-encodings that occur strongly in most magnetic resonance imaging sequences.

Original languageEnglish (US)
Pages (from-to)473-483
Number of pages11
JournalJournal of Computer Assisted Tomography
Volume10
Issue number3
StatePublished - 1986
Externally publishedYes

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ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Radiological and Ultrasound Technology

Cite this

Perman, W. H., Moran, P. R., Moran, R. A., & Bernstein, M. A. (1986). Artifacts from pulsatile flow in MR imaging. Journal of Computer Assisted Tomography, 10(3), 473-483.