A 3D time reversal cavity for the focusing of high-intensity ultrasound pulses over a large volume. Robin, J, Arnal, B, Tanter, M, & Pernot, M Physics in Medicine and Biology, 62(3):810–824, February, 2017. 5 citations (Crossref) [2023-04-10]
Paper doi abstract bibtex Shock wave ultrasound therapy techniques, increasingly used for non-invasive surgery, require extremely high pressure amplitudes in precise focal spots, and large high-power transducers arranged on a spherical shell are usually used to achieve that. This solution allows limited steering of the beam around the geometrical focus of the device at the cost of a large number of transducer elements, and the treatment of large and moving organs like the heart is challenging or impossible. This paper validates numerically and experimentally the possibility of using a time reversal cavity (TRC) for the same purpose. A 128-element, 1 MHz power transducer combined with different multiple scattering media in a TRC was used. We were able to focus high-power ultrasound pulses over a large volume in a controlled manner, with a limited number of transducer elements. We reached sufficiently high pressure amplitudes to Erode an Ultracal® target over a 10 cm2 area. © 2017 Institute of Physics and Engineering in Medicine.
@article{robin_3d_2017,
title = {A {3D} time reversal cavity for the focusing of high-intensity ultrasound pulses over a large volume},
volume = {62},
issn = {0031-9155, 1361-6560},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85010023415&doi=10.1088%2F1361-6560%2Faa52ab&partnerID=40&md5=d8024a389c17b09fe9cbf961abd493be},
doi = {10.1088/1361-6560/aa52ab},
abstract = {Shock wave ultrasound therapy techniques, increasingly used for non-invasive surgery, require extremely high pressure amplitudes in precise focal spots, and large high-power transducers arranged on a spherical shell are usually used to achieve that. This solution allows limited steering of the beam around the geometrical focus of the device at the cost of a large number of transducer elements, and the treatment of large and moving organs like the heart is challenging or impossible. This paper validates numerically and experimentally the possibility of using a time reversal cavity (TRC) for the same purpose. A 128-element, 1 MHz power transducer combined with different multiple scattering media in a TRC was used. We were able to focus high-power ultrasound pulses over a large volume in a controlled manner, with a limited number of transducer elements. We reached sufficiently high pressure amplitudes to Erode an Ultracal® target over a 10 cm2 area. © 2017 Institute of Physics and Engineering in Medicine.},
number = {3},
urldate = {2023-04-10},
journal = {Physics in Medicine and Biology},
author = {Robin, J and Arnal, B and Tanter, M and Pernot, M},
month = feb,
year = {2017},
note = {5 citations (Crossref) [2023-04-10]},
keywords = {Acoustic fields, Acoustic wave propagation, Electr, High power ultrasound, High-Intensity Focused Ultrasound Ablation, Human, Imaging, Lithotripsy, Pressure, Transducers, devices, diagnostic imaging, high intensity focus, high-power ultrasound, histotripsy, lithotripsy, shock wave, therapy, time reversal focusing},
pages = {810--824},
}
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