Numerical analysis of ultrasound propagation and reflection intensity for biological acoustic impedance microscope

Gunawan, Agus; Hozumi, Naohiro; Saijo, Yoshifumi; Kobayashi, Kazuto; Yamamoto, Seiji

doi:10.1016/j.ultras.2015.03.010

Cited by 33 publications

(33 citation statements)

References 17 publications

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“…Because in the previous research which also developed a conversion curve from the echo signal [1][2][3][4][5][6][7][8][9], the pre-processing method of the echo signal was not discussed in detail. It is either because the profile of the received echo signal was already good or because a pre-processing of the signal is not required.…”

Section: Originalitymentioning

confidence: 99%

“…In the previous research, Agus Indra Gunawan [1], had already built a calculation method to calculate the received intensity of the two-dimensional of the potential distribution of ultrasound. The calculation was done by transforming a 2D potential distribution of ultrasonic wave into a 2D plane wave k-space by using Fourier transform, thus the total intensity received at the transducer was calculated by summing all components of the potential distribution in real space.…”

Section: The Normalization Graph Of Rms and Peakmentioning

confidence: 99%

“…In ultrasound measurement, one of the method to calculate the acoustic impedance value is by using a conversion curve, which converts the value of peak-to-peak or the Root Mean Square (RMS) of an echo signal into acoustic impedance [1][2][3][4][5][6][7][8][9]. However, the RMS and peak-to-peak value cannot be measured directly because sometimes the received echo signal is contained with noise which frequency is higher than the echo frequency.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Enhancement of 3 MHz Ultrasonic Echo Signal for Conversion Curve Development for Acoustic Impedance Estimation by Using Wavelet Transform

Prastika

Gunawan

Dewantara

et al. 2018

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Ultrasonic technology has already been applied for many applications. Most of them are mainly used for object measurement. Some techniques have been widely applied to particular measurement by utilizing a very specific component. In this research, the previous technique to develop a conversion curve to obtain the acoustic impedance of the target is adopted. Then, a 3 MHz concave shaped ultrasonic transducer for measuring liquids is proposed and a confirmation is needed to confirm if the system is correct. Therefore, several saline solutions with some known properties are used. A low voltage of 10 Volt pulse is sent to trigger the transducer. The ultrasonic wave is transmitted through the multilayered mediums, which is pure water, clear acrylic, and the target. The echo from the interface between the acrylic and the target is then received by the same transducer. Some parameters such as peak and Root Mean Square (RMS) are used to develop the conversion curve. A peak detection and comparison between the original echo and the processed one by using Wavelet transform is performed. Some analysis of the echo signal by using multiresolution and timefrequency analysis are also proposed. The result obtained from the measurement is then compared to the theoretical calculation. Based on the result, in terms of developing the conversion curve, only the RMS value of the Undecimated Wavelet Transform (UWT) which has the closest trend to the result of the calculation, with the mean percentage error of 0.65512%, which is the smallest value among all parameters.

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Section: Originalitymentioning

confidence: 99%

Section: The Normalization Graph Of Rms and Peakmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Enhancement of 3 MHz Ultrasonic Echo Signal for Conversion Curve Development for Acoustic Impedance Estimation by Using Wavelet Transform

Prastika

Gunawan

Dewantara

et al. 2018

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“…The protocol for this experiment was approved by the Animal Research Committee of Tohoku University (approval number: [22][23][24].…”

Section: Tissue Preparationmentioning

confidence: 99%

“…Based on the above background, HONDA ELECTRONICS Co., Ltd. (Toyohashi, Japan) and Tohoku University Graduate School of Biomedical Engineering have developed the acoustic impedance microscope (AIM) which enables to image the two-dimensional distribution of the acoustic intensity and impedance of the sample [ 20 ]. AIM has been applied to observe cerebellum tissue [ 21 ] and cultured glial and glioma cells [ 22 ]; these studies reported that AIM also provided the acoustic intensity and impedance image at a microscopic level.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Diagnosis Device for Dentistry

Hatori

Saijo

Hagiwara

et al. 2016

Interface Oral Health Science 2016

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There are a lot of diseases which show the abnormal elastic property. Although many medical doctors and dentists have noticed the change of tissue elasticity due to the disease, the diagnostic device to examine the tissue elastic property objectively has not well developed.At Tohoku University, acoustic microscopy (AM) for medicine and biology has been developed and applied for more than 20 years. Application of AM has three major features and objectives. First, specifi c staining is not required for characterization or observation. Second, it provides the elastic property and information of

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A hydrate blockage detection apparatus for gas pipeline using ultrasonic focused transducer and its application on a flow loop

Liu

et al. 2020

Energy Science & Engineering

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This paper introduces a novel apparatus and the analyzing method for hydrate blockage detection in natural gas pipeline using the ultrasonic focused testing technique. The apparatus mainly consists of three parts: an ultrasonic focused transducer, a supporting guide track and a positioning ruler for the transducer. It can be installed by fixing the guide track onto the pipe outer wall, and the distance of the transducer to the pipe wall can be adjusted with the positioning ruler. The reflection signals of hydrate surfaces can be then received and recorded by an oscilloscope. The hydrate thickness thus can be calculated by multiplying the ultrasonic velocity with the time difference between two reflections. A calibrating test using this apparatus certified that it can provide an accurate measurement of both the pipe wall thickness and the hydrate blockage thickness from outside of the pipe. A maximum hydrate thickness of 50 mm can be measured due to the high penetrability of the ultrasonic. The feasibility of applying this apparatus to the metal pipeline was verified with a carbon steel cylinder with ice attached on the inner wall. A 360° blockage profile around the cylinder was obtained with a step angle of 5°. The accuracy of measured thickness and cross‐sectional area of the blockage can reach 96% and 91%, respectively. Finally, an application test was conducted on a full visible flow loop of 35 mm inner diameter and 49 m length. The test results showed that the hydrate blockage contour measurement can be achieved with this apparatus despite the gas and water flow in the loop. This hydrate blockage detection apparatus can be applied to gas‐dominated pipelines in which hydrate mainly forms on the wall. Early warning of hydrate blockage can be further studied based on the measurement results using this apparatus.

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Numerical analysis of ultrasound propagation and reflection intensity for biological acoustic impedance microscope

Cited by 33 publications

References 17 publications

The Enhancement of 3 MHz Ultrasonic Echo Signal for Conversion Curve Development for Acoustic Impedance Estimation by Using Wavelet Transform

The Enhancement of 3 MHz Ultrasonic Echo Signal for Conversion Curve Development for Acoustic Impedance Estimation by Using Wavelet Transform

Acoustic Diagnosis Device for Dentistry

A hydrate blockage detection apparatus for gas pipeline using ultrasonic focused transducer and its application on a flow loop

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