Optimization of Contrast Resolution by Genetic Algorithm in Ultrasound Tissue Harmonic Imaging - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Ultrasonics Année : 2016

Optimization of Contrast Resolution by Genetic Algorithm in Ultrasound Tissue Harmonic Imaging

Sébastien Ménigot
Jean-Marc Girault

Résumé

The development of ultrasound imaging techniques such as pulse inversion has improved tissue harmonic imaging. Nevertheless, no recommendation has been made to date for the design of the waveform transmitted through the medium being explored. Our aim was therefore to find automatically the optimal " imaging " wave which maximized the contrast resolution without a priori information. To overcome assumption regarding the waveform, a genetic algorithm investigated the medium thanks to the transmission of stochastic " explorer " waves. Moreover, these stochastic signals could be constrained by the type of generator available (bipolar or arbitrary). To implement it, we changed the current pulse inversion imaging system by including feedback. Thus the method optimized the contrast resolution by adaptively selecting the samples of the excitation. In simulation, we benchmarked the contrast effectiveness of the best found transmitted stochastic commands and the usual fixed-frequency command. The optimization method converged quickly after around 300 iterations in the same optimal area. These results were confirmed experimentally. In the experimental case, the contrast resolution measured on a radiofrequency line could be improved by 6% with a bipolar generator and it could still increase by 15% with an arbitrary waveform generator.
Fichier principal
Vignette du fichier
articleStochasticSystemsClean.pdf (2.53 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01340713 , version 1 (01-07-2016)

Identifiants

Citer

Sébastien Ménigot, Jean-Marc Girault. Optimization of Contrast Resolution by Genetic Algorithm in Ultrasound Tissue Harmonic Imaging. Ultrasonics, 2016, 71, pp.231-244. ⟨10.1016/j.ultras.2016.06.022⟩. ⟨hal-01340713⟩

Relations

Collections

UNIV-TOURS IBRAIN
109 Consultations
180 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More