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Pré-Publication, Document De Travail Année : 2018

Optimal Dual-VENC (ODV) Unwrapping in Phase-Contrast MRI

Résumé

Dual-VENC strategies have been proposed to improve the velocity-to-noise ratio in Phase-Contrast MRI. However, they are based on aliasing-free high-VENC data. The aim of this work is hence to propose a dual-VENC velocity estimation method allowing high-VENC aliased data. For this purpose, we reformulate the phase-contrast velocity as a least squares estimator, providing a natural framework for including multiple encoding gradient measurements. By analyzing the mathematical properties of both single-and dual-VENC problems, we can justify theoretically high/low-VENC ratios such that the aliasing velocity can be minimized. The resulting reconstruction algorithm was assessed using three types of data: numerical, experimental and volunteers. In clinical practice, this method would allow shorter examination times by avoiding tedious adaptation of VENC values by repeated scans.
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Dates et versions

hal-01887027 , version 1 (03-10-2018)

Identifiants

  • HAL Id : hal-01887027 , version 1

Citer

Hugo Carrillo, Axel Osses, Sergio Uribe, Cristobal Bertoglio. Optimal Dual-VENC (ODV) Unwrapping in Phase-Contrast MRI. 2018. ⟨hal-01887027⟩

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