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Filtrage spatio-temporel en IRM de flux sanguin 4D

Abstract : 4D PC-MRI provides the spatio-temporal imaging of the blood-flow velocity in an area of interest such as the aortic system during a cardiac cycle. However, the resolution and the signal-to-noise ratio (SNR) are limited by acquisition constraints. In order to improve the SNR, we propose to regularize the blood-flow velocity field by introducing a physical constraint, incompressibility, and a temporal quadratic penalization. The advantage of the developed solution is its simple implementation while enhancing significantly the speed precision and speed-to-noise ratio (SpNR).
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https://hal.archives-ouvertes.fr/hal-01720339
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Submitted on : Wednesday, July 29, 2020 - 2:38:47 PM
Last modification on : Wednesday, September 14, 2022 - 3:08:05 PM
Long-term archiving on: : Tuesday, December 1, 2020 - 9:37:30 AM

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  • HAL Id : hal-01720339, version 1

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Sébastien Levilly, Jérôme Idier, Félicien Bonnefoy, David Le Touzé, Perrine Paul-Gilloteaux, et al.. Filtrage spatio-temporel en IRM de flux sanguin 4D. XXVIème colloque GRETSI sur le Traitement du Signal et des Images, Sep 2017, Juan-Les-Pins, France. ⟨hal-01720339⟩

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