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Velocity unwrap for high resolution slice-selective Fourier velocity encoding using spiral SENSE

Steeden, JA; Jones, A; Atkinson, D; Taylor, AM; Muthurangu, V; (2012) Velocity unwrap for high resolution slice-selective Fourier velocity encoding using spiral SENSE. Presented at: ISMRM 2012, Melbourne, Australia.

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Abstract

Quantification of peak velocity is important in the assessment of stenotic flow jets. It is possible to measure peak velocity accurately using Fourier Velocity Encoding (FVE). In this study, a fast, high-resolution slice-selective FVE sequence was developed with the use of spiral trajectories, parallel-imaging, partial-Fourier in the velocity-dimension and a novel velocity-unwrap technique. The resulting sequence was acquired within a short breath-hold. Peak velocities were compared from Doppler ultrasound (US), phase-contrast MR (PCMR) and FVE. Experiments carried out in-vitro and in-vivo showed that PCMR tended to underestimate peak velocity compared to Doppler US, whereas FVE agreed well with Doppler US.

Type: Conference item (UNSPECIFIED)
Title: Velocity unwrap for high resolution slice-selective Fourier velocity encoding using spiral SENSE
Event: ISMRM 2012
Location: Melbourne, Australia
Dates: 07 May 2012 - 12 May 2012
UCL classification: UCL > School of Life and Medical Sciences
UCL > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > School of Life and Medical Sciences > Faculty of Medical Sciences > Medicine (Division of)
UCL > School of Life and Medical Sciences > Faculty of Medical Sciences > Medicine (Division of) > Metabolism and Experimental Therapeutics
URI: http://discovery.ucl.ac.uk/id/eprint/1345048
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