PMID: 8448401Mar 1, 1993Paper

Analysis of MR phase-contrast measurements of pulsatile velocity waveforms

Journal of Magnetic Resonance Imaging : JMRI
N J HangiandreouS J Riederer

Abstract

Errors in the measurement of the mean velocity of pulsatile velocity waveforms with ungated phase-contrast techniques were studied theoretically and experimentally. Waveforms consisting of a constant and two sinusoidal components were analyzed. Variations in magnitude and phase of the vascular magnetic resonance (MR) signal resulted in errors, the severity of which increased when either factor increased. Magnitude variations always resulted in overestimation. The general shape of the waveform greatly influenced the error, with certain waveforms producing greater inherent error than others. Experimental measurements were performed, validating the predicted sensitivity of these errors to changes in imaging parameters, including TR and flow-encoding sensitivity. Errors generally became more severe with increased flow-encoding sensitivity. The theoretical and experimental results suggest that accurate mean velocity measurements in many vessels of the body--with acquisition times of less than 15 seconds--should be attainable with ungated imaging techniques and with careful selection of relevant imaging parameters.

References

May 1, 1992·Journal of Magnetic Resonance Imaging : JMRI·K Butts, S J Riederer
Nov 1, 1991·Journal of Magnetic Resonance Imaging : JMRI·J L Duerk, O P Simonetti
Oct 1, 1991·Radiology·S J RiedererR C Grimm
Mar 1, 1990·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·J P HornakJ Szumowski
Jan 1, 1990·Magnetic Resonance Imaging·M H ChoZ H Cho
Dec 1, 1989·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·D N FirminD B Longmore

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Citations

Feb 25, 1999·Journal of Magnetic Resonance Imaging : JMRI·C J BakkerM A Viergever
Apr 16, 1999·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·R M HoogeveenM A Viergever
Jan 1, 1996·Magnetic Resonance Imaging·C J BakkerW P Mali
May 19, 2010·Circulation·UNKNOWN American College of Cardiology Foundation Task Force on Expert Consensus DocumentsPamela K Woodard
Mar 1, 1994·Journal of Magnetic Resonance Imaging : JMRI·J O Fredrickson, N J Pelc
Dec 2, 2011·Journal of Cardiovascular Medicine·Antonello D'AndreaJames C Moon
Jul 16, 2010·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Michael S JanszChristopher K Macgowan
Jul 28, 2010·IEEE Transactions on Bio-medical Engineering·Raffaele PonziniAlberto Redaelli
Jun 2, 2010·Journal of the American College of Cardiology·UNKNOWN American College of Cardiology Foundation Task Force on Expert Consensus DocumentsPamela K Woodard
Sep 14, 2016·Journal of Magnetic Resonance Imaging : JMRI·Mark Bitsch VestergaardOtto Mølby Henriksen
Sep 1, 1995·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·R L WolfR L Ehman
Oct 1, 1994·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·G B PikeN J Pelc
Apr 1, 1994·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·M H Buonocore, L Gao
Nov 1, 1995·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·S E MaierF A Jolesz
Dec 24, 2017·Journal of Magnetic Resonance Imaging : JMRI·Uday KrishnamurthyJaladhar Neelavalli
Jan 24, 2003·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Jong B ParkDwight G Nishimura
Sep 1, 1996·Stroke; a Journal of Cerebral Circulation·C F BladinC R Hardingham
Nov 1, 1994·Journal of Magnetic Resonance Imaging : JMRI·M L LauzonB K Rutt
Sep 4, 1999·Physiological Measurement·D W HoldsworthB K Rutt
Jan 22, 2019·Journal of Cardiovascular Magnetic Resonance : Official Journal of the Society for Cardiovascular Magnetic Resonance·Eric M SchraubenChristopher K Macgowan

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