Phase‐contrast velocity mapping for highly diffusive fluids: Optimal bipolar gradient pulse parameters for hyperpolarized helium‐3
Identifieur interne : 003D49 ( Main/Exploration ); précédent : 003D48; suivant : 003D50Phase‐contrast velocity mapping for highly diffusive fluids: Optimal bipolar gradient pulse parameters for hyperpolarized helium‐3
Auteurs : Lionel Martin [France] ; Xavier Maître [France] ; Ludovic De Rochefort [France] ; Mathieu Sarracanie [France] ; Marlies Friese [France, Australie] ; Pascal Hagot [France] ; Emmanuel Durand [France]Source :
- Magnetic Resonance in Medicine [ 0740-3194 ] ; 2014-10.
Abstract
In MR‐velocity phase‐contrast measurements, increasing the encoding bipolar gradient, i.e., decreasing the field of speed, usually improves measurement precision. However, in gases, fast diffusion during the bipolar gradient pulses may dramatically decrease the signal‐to‐noise ratio, thus degrading measurement precision. These two effects are contradictory. This work aims at determining the optimal sequence parameters to improve the velocity measurement precision.
Url:
DOI: 10.1002/mrm.25005
Affiliations:
- Australie, France
- Alsace (région administrative), Grand Est
- Orsay, Strasbourg
- Université de Strasbourg
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Le document en format XML
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<front><div type="abstract">In MR‐velocity phase‐contrast measurements, increasing the encoding bipolar gradient, i.e., decreasing the field of speed, usually improves measurement precision. However, in gases, fast diffusion during the bipolar gradient pulses may dramatically decrease the signal‐to‐noise ratio, thus degrading measurement precision. These two effects are contradictory. This work aims at determining the optimal sequence parameters to improve the velocity measurement precision.</div>
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<name sortKey="Durand, Emmanuel" sort="Durand, Emmanuel" uniqKey="Durand E" first="Emmanuel" last="Durand">Emmanuel Durand</name>
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