Super-resolution photoacoustic and ultrasound imaging with sparse arrays - Institut Langevin Accéder directement au contenu
Article Dans Une Revue Scientific Reports Année : 2020

Super-resolution photoacoustic and ultrasound imaging with sparse arrays

Résumé

It has previously been demonstrated that model-based reconstruction methods relying on a priori knowledge of the imaging point spread function (PSF) coupled to sparsity priors on the object to image can provide super-resolution in photoacoustic (PA) or in ultrasound (US) imaging. Here, we experimentally show that such reconstruction also leads to super-resolution in both PA and US imaging with arrays having much less elements than used conventionally (sparse arrays). As a proof of concept, we obtained super-resolution PA and US cross-sectional images of microfluidic channels with only 8 elements of a 128-elements linear array using a reconstruction approach based on a linear propagation forward model and assuming sparsity of the imaged structure. Although the microchannels appear indistinguishable in the conventional delay-and-sum images obtained with all the 128 transducer elements, the applied sparsity-constrained model-based reconstruction provides super-resolution with down to only 8 elements. We also report simulation results showing that the minimal number of transducer elements required to obtain a correct reconstruction is fundamentally limited by the signal-to-noise ratio. The proposed method can be straigthforwardly applied to any transducer geometry, including 2D sparse arrays for 3D super-resolution PA and US imaging.
Fichier principal
Vignette du fichier
main.pdf (1.68 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-02569202 , version 1 (25-11-2020)

Identifiants

Citer

Sergey Vilov, Bastien Arnal, Eliel Hojman, Yonina Eldar, Ori Katz, et al.. Super-resolution photoacoustic and ultrasound imaging with sparse arrays. Scientific Reports, 2020, 10 (1), ⟨10.1038/s41598-020-61083-2⟩. ⟨hal-02569202⟩
132 Consultations
100 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More