Coherence-Weighted Synthetic Focusing Applied to Photoacoustic Imaging Using a High-Frequency Annular-Array Transducer

Autor: Orlando Aristizabal, Ashwin Sampathkumar, Jonathan Mamou, Jeffrey A. Ketterling, Parag V. Chitnis, Erwan Filoux

Publikováno v: Ultrasonic Imaging. 38:32-43

This paper presents an adaptive synthetic-focusing scheme that, when applied to photoacoustic (PA) data acquired using an annular array, improves focusing across a greater imaging depth and enhances spatial resolution. The imaging system was based on

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3066ac2738649f16e556158780518e7e
https://doi.org/10.1177/0161734615583981

Non-Planar Pad-Printed Thick-Film Focused High-Frequency Ultrasonic Transducers for Imaging and Therapeutic Applications

Autor: Wanda W. Wolny, Ronald H. Silverman, Marc Lethiecq, Rasmus Lou-Moeller, Erwan Filoux, Franck Levassort, L.P. Tran-Huu-Hue, Jeffrey A. Ketterling

Publikováno v: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Institute of Electrical and Electronics Engineers, 2012, 59 (9), pp.1976-1982. 〈10.1109/TUFFC.2012.2416〉
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Institute of Electrical and Electronics Engineers, 2012, 59 (9), pp.1976-1982. ⟨10.1109/TUFFC.2012.2416⟩

International audience; Pad-printed thick-film transducers have been shown to be an interesting alternative to lapped bulk piezoceramics, because the film is deposited with the required thickness, size, and geometry, thus avoiding any subsequent mach

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06bec79d898915cfea64ffe7ef75f93d
https://doi.org/10.1109/tuffc.2012.2416

3-D numerical modeling for axisymmetrical piezoelectric structures: application to high-frequency ultrasonic transducers

Autor: Franck Levassort, Marc Lethiecq, Rasmus Lou-Moeller, Erwan Filoux, Samuel Callé

Publikováno v: IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 57:1188-1199

The transient analysis of piezoelectric transducers is often performed using finite-element or finite-difference time-domain methods, which efficiently calculate the vibration of the structure but whose numerical dispersion prevents the modeling of w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::50203c35498a5120446de6d6fce7fe6e
https://doi.org/10.1109/tuffc.2010.1532

High-frequency annular array with coaxial illumination for dual-modality ultrasonic and photoacoustic imaging

Autor: Orlando Aristizabal, Erwan Filoux, Parag V. Chitnis, Jeffrey A. Ketterling, Ashwin Sampathkumar

Publikováno v: The Review of scientific instruments. 84(5)

This paper presents a combined ultrasound and photoacoustic (PA) imaging (PAI) system used to obtain high-quality, co-registered images of mouse-embryo anatomy and vasculature. High-frequency ultrasound (HFU, >20 MHz) is utilized to obtain high-resol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a4e68982030435df068b3c21bd6ff9cc
https://pubmed.ncbi.nlm.nih.gov/23742556

High-frame-rate retrospective imaging of mouse-embryo cardiac function using annular array and Doppler-derived gating

Autor: Jonathan Mamou, Orlando Aristizabal, Erwan Filoux, Jeffrey A. Ketterling

Publikováno v: Proceedings of Meetings on Acoustics.

A high-frequency (HF) imaging system based on a custom 5-element, 40 MHz annular array has been used to study the cardiovascular development of mouse embryos. High-frame-rate imaging of the heart dynamics was achieved using a retrospective reconstruc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fba7d49bbcf2e2b681fe482d914a7958
https://doi.org/10.1121/1.4800362