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231225s2018 xx |||||o 00| ||eng c |
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|a 10.1109/TUFFC.2018.2841341
|2 doi
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|a eng
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1 |
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|a Mohanty, Kaustav
|e verfasserin
|4 aut
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|a Observation of Self-Bending and Focused Ultrasound Beams in the Megahertz Range
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|c 2018
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 20.11.2019
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Self-bending (or self-accelerating) and nondiffracting acoustic beams, such as Airy beams, have the potential to focus around obstacles that are directly in the beam path. Here, we demonstrate the self-bending and focusing properties of Airy beams in the ultrasound domain using finite difference time-domain simulations at 5.2 MHz. The phase profiles of self-bending Airy beams are determined from the Airy function. This beam is then transmitted experimentally using a linear array transducer connected to a 128 channel Vantage Verasonics operating at 5.2 MHz. The performance of self-bending beams is compared to conventional focused ultrasound beams in the presence of a strong scattering obstacle (steel rod). The ability of self-bending Airy beams to bypass obstacles is characterized in terms of their relative energy retention at peak intensity, that was found experimentally to be 50.5% for traditional focused beams whereas 71.5% for Airy beams, proving that self-bending beams performed better than conventional beams in terms of relative energy retention with no significant change in the focal profiles. However, it is observed that, in absolute terms, self-bending beams focus less energy than traditional focused beams
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|a Journal Article
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1 |
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|a Mahajan, Siddharth
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Pinton, Gianmarco
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Muller, Marie
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Jing, Yun
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t IEEE transactions on ultrasonics, ferroelectrics, and frequency control
|d 1986
|g 65(2018), 8 vom: 26. Aug., Seite 1460-1467
|w (DE-627)NLM098181017
|x 1525-8955
|7 nnns
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| 773 |
1 |
8 |
|g volume:65
|g year:2018
|g number:8
|g day:26
|g month:08
|g pages:1460-1467
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|u http://dx.doi.org/10.1109/TUFFC.2018.2841341
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