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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. In: (Proceedings) ISMRM 2012. (pp. 672 - ?).

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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:Proceedings paper
Title:Velocity unwrap for high resolution slice-selective Fourier velocity encoding using spiral SENSE
Event:ISMRM 2012
Location:Melbourne, Australia
Dates:2012-05-07 - 2012-05-12
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Medical Sciences > Medicine (Division of)

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