Metrology for ultrasonic applications

Zeqiri, Bajram

doi:10.1016/j.pbiomolbio.2006.07.023

Cited by 19 publications

(12 citation statements)

References 30 publications

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“…The acoustic energy input has been typically given as the power consumed by the piezo, calculated by calorimetric methods (Zeqiri 2007) or obtained experimentally by using hydrophones. Unfortunately, none of these options were possible in our case.…”

Section: Experimental Set-up and Techniquesmentioning

confidence: 99%

Streaming flow by oscillating bubbles: quantitative diagnostics via particle tracking velocimetry

et al. 2017

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Oscillating microbubbles can be used as microscopic agents. Using external acoustic fields they are able to set the surrounding fluid into motion, erode surfaces and even to carry particles attached to their interfaces. Although the acoustic streaming flow that the bubble generates in its vicinity has been often observed, it has never been measured and quantitatively compared with the available theoretical models. The scarcity of quantitative data is partially due to the strong three-dimensional character of bubble-induced streaming flows, which demands advanced velocimetry techniques. In this work, we present quantitative measurements of the flow generated by single and pairs of acoustically excited sessile microbubbles using a three-dimensional particle tracking technique. Using this novel experimental approach we are able to obtain the bubble's resonant oscillating frequency, study the boundaries of the linear oscillation regime, give predictions on the flow strength and the shear in the surrounding surface and study the flow and the stability of a two-bubble system. Our results show that velocimetry techniques are a suitable tool to make diagnostics on the dynamics of acoustically excited microbubbles.

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Section: Experimental Set-up and Techniquesmentioning

confidence: 99%

Streaming flow by oscillating bubbles: quantitative diagnostics via particle tracking velocimetry

et al. 2017

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“…A schematic of the pulse-echo approach is shown in Figure 1.1. In the pitch-catch approach a pulse signal sent All three approaches are well-established in NDE and SHM industries and there have been a large amount of studies on developing these UT methodologies [18,19,20,21,22,23].…”

Section: Implementationsmentioning

confidence: 99%

Optimal Wave Propagation-Based Nondestructive Test Design for Quantitative Damage Characterization

et al. 2015

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“…Normally, an ultrasound machine possesses another processor to perform gating and calculations of distance, area, volume, and other measurements [89], as well as to make text presentations, record patient data, display screen auxiliary signals, indicate equipment status, etc. [90,91].…”

Section: The Control Microprocessormentioning

confidence: 99%

Application of ultrasound in medicine part ii: the ultrasonic transducer and its associated electronics

2013

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This paper introduces the reader to a review and analysis of various ultrasound (us) applications in the medical field. First, the transducer is shown, along with a diagram of the basic electronics that it uses to generate and receive signals that allow the reconstruction of images, for medical purposes. Also, us practical uses in medical therapy is shown. This subject is addressed by combining the physical principles involved in the us application, with the implemented technology and the modes of operation for non-invasive studies of pathologies related to brain, heart, and eyes such as injuries, tumors and hematomas. The methodology used in this article also suggests an analysis method for the us scientific and technological research principles combined for their implementation in medical applications.Keywords: ultrasonic transducer, piezoelectric, transmitter, receiver, converter, modes ResumenEn este trabajo se presenta al lector una revisión y análisis de diferentes aplicaciones del ultrasonido (us) en el campo médico. Inicialmente se muestra el transductor y un esquema de su electrónica básica asociada usada para emitir y adquirir las señales que permiten la reconstrucción de las imágenes, para efectos médicos y también la aplicación del us para terapia; la temática se aborda conjugando los principios físicos asociados a la aplicación del us con la tecnología implementada y sus modos de operación, para estudios no invasivos de patologías relacionadas con el cerebro, el corazón, los ojos y lesiones tales como tumores y hematomas. La metodología implementada en este artículo sugiere también un método de análisis de los principios científicos del us e investigación tecnológica asociadas para su concreción en las aplicaciones médicas.

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Metrology for ultrasonic applications

Cited by 19 publications

References 30 publications

Streaming flow by oscillating bubbles: quantitative diagnostics via particle tracking velocimetry

Streaming flow by oscillating bubbles: quantitative diagnostics via particle tracking velocimetry

Optimal Wave Propagation-Based Nondestructive Test Design for Quantitative Damage Characterization

Application of ultrasound in medicine part ii: the ultrasonic transducer and its associated electronics

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