Effects of turbulent velocity fluctuations upon computationally simulated magnetic resonance angiograms

John M. Siegel, John N. Oshinski, Roderic I. Pettigrew, David N. Ku

Research output: Contribution to conferencePaper

Abstract

Magnetic resonance time-of-flight angiography is currently limited in the evaluation of arterial diseases by the signal loss which occurs with flow through stenoses. This signal loss has been attributed to phase dispersion and to phase misregistration. The current study used computational simulations of 2D time-of-flight MR angiograms to examine signal loss distal to a stenosis. The results indicated that turbulent phase dispersion (range of phase within a pixel due to turbulent motion) was the dominant mechanism of signal loss, while phase misregistration and mean flow phase dispersion acted as secondary effects. The computational simulations of turbulent intravoxel signal loss can be significantly turbulent intravoxel signal loss can be significantly reduced through low echo time, high gradient slew rate periodic waveforms.

Original languageEnglish (US)
Pages369-370
Number of pages2
StatePublished - Jan 1 1995
EventProceedings of the 1995 Bioengineering Conference - Beever Creek, CO, USA
Duration: Jun 28 1995Jul 2 1995

Other

OtherProceedings of the 1995 Bioengineering Conference
CityBeever Creek, CO, USA
Period6/28/957/2/95

ASJC Scopus subject areas

  • Engineering(all)

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