Effects of turbulent velocity fluctuations upon computationally simulated magnetic resonance angiograms

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

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 conference › Paper › peer-review

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 language	English (US)
Pages	369-370
Number of pages	2
State	Published - Jan 1 1995
Event	Proceedings of the 1995 Bioengineering Conference - Beever Creek, CO, USA Duration: Jun 28 1995 → Jul 2 1995

Other

Other	Proceedings of the 1995 Bioengineering Conference
City	Beever Creek, CO, USA
Period	6/28/95 → 7/2/95

ASJC Scopus subject areas

Engineering(all)

Cite this

@conference{73798c05e6344c7eaf6862ccf31acf73,

title = "Effects of turbulent velocity fluctuations upon computationally simulated magnetic resonance angiograms",

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.",

author = "Siegel, {John M.} and Oshinski, {John N.} and Pettigrew, {Roderic I.} and Ku, {David N.}",

year = "1995",

month = jan,

day = "1",

language = "English (US)",

pages = "369--370",

note = "Proceedings of the 1995 Bioengineering Conference ; Conference date: 28-06-1995 Through 02-07-1995",

}

TY - CONF

T1 - Effects of turbulent velocity fluctuations upon computationally simulated magnetic resonance angiograms

AU - Siegel, John M.

AU - Oshinski, John N.

AU - Pettigrew, Roderic I.

AU - Ku, David N.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0029214402&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0029214402&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:0029214402

SP - 369

EP - 370

T2 - Proceedings of the 1995 Bioengineering Conference

Y2 - 28 June 1995 through 2 July 1995

ER -

Effects of turbulent velocity fluctuations upon computationally simulated magnetic resonance angiograms

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