Continuous-wave ultrasound reflectometry for surface roughness imaging applications

Mitri, F.G.; Kinnick, Randall R.; Greenleaf, James F.; Fatemi, Mostafa

doi:10.1016/j.ultras.2008.06.011

Cited by 16 publications

(10 citation statements)

References 18 publications

(23 reference statements)

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“…An emerging area of focus is thyroid imaging in which some preliminary work has been reported [109, 110]. VA imaging has been used for nondestructive testing applications on non-biological objects [111–114]. …”

Section: Discussionmentioning

confidence: 99%

A Review of Vibro-acoustography and its Applications in Medicine

Urban

Alizad²,

Aquino

et al. 2011

CMIR

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In recent years, several new techniques based on the radiation force of ultrasound have been developed. Vibro-acoustography is a speckle-free ultrasound based imaging modality that can visualize normal and abnormal soft tissue through mapping the acoustic response of the object to a harmonic radiation force induced by ultrasound. In vibro-acoustography, the ultrasound energy is converted from high ultrasound frequencies to a low acoustic frequency (acoustic emission) that is often two orders of magnitude smaller than the ultrasound frequency. The acoustic emission is normally detected by a hydrophone. In medical imaging, vibroacoustography has been tested on breast, prostate, arteries, liver, and thyroid. These studies have shown that vibro-acoustic data can be used for quantitative evaluation of elastic properties. This paper presents an overview of vibro-acoustography and its applications in the areas of biomedicine.

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Section: Discussionmentioning

confidence: 99%

A Review of Vibro-acoustography and its Applications in Medicine

Urban

Alizad²,

Aquino

et al. 2011

CMIR

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“…As sound waves travel with little attenuation in solids and fluids in which electromagnetic waves do not propagate, acoustic imaging techniques have been applied to many fields including underwater sound navigation and ranging (SONAR) [1][2][3][4][5], medical diagnosis [6][7][8] and nondestructive evaluation [9][10][11][12]. In general, the target object is illuminated by acoustic waves, and then the reflected or transmitted waves are recorded.…”

Section: Introductionmentioning

confidence: 99%

RGB representation of two-dimensional multi-spectral acoustic data for object surface profile imaging

Guo¹,

Wada²,

Mizuno³

et al. 2013

Meas. Sci. Technol.

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Conventionally, acoustic imaging has been performed using a single frequency or a limited number of frequencies. However, the rich information on surface profiles, structures hidden under surfaces and material properties of objects may exhibit frequency dependence. In this study, acoustic imaging on object surface was conducted over a wide frequency range with a fine frequency step, and a method for displaying the acquired multi-spectral acoustic data was proposed. A complicated rigid surface with different profiles was illuminated by sound waves sweeping over the frequency range from 1 to 20 kHz with a 30 Hz step. The reflected sound was two-dimensionally recorded using a scanning microphone, and processed using a holographic reconstruction method. The two-dimensional distributions of obtained sound pressure at each frequency were defined as 'multi-spectral acoustic imaging data'. Next, the multi-spectral acoustic data were transformed into a single RGB-based picture for easy understanding of the surface characteristics. The acoustic frequencies were allocated to red, green and blue using the RGB filter technique. The depths of the grooves were identified by their colours in the RGB image.

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“…In contrast, Raleigh wave that propagates on the superficial layer of the medium has also been studied [4][5][6][7][8][9][10]. It has been proved both theoretically and experimentally that low frequency (under 1000 Hz) surface wave velocity is related to the tissue elasticity and can be measured by noncontact methods [10].…”

Section: Introductionmentioning

confidence: 99%

“…Surface wave propagation can be measured by piezoelectric elements [4], ultrasound [5] and optical devices [6][7][8][9][10]. Among the optical techniques, [6,7] uses a simple setup based on optical defocusing.…”

Section: Introductionmentioning

confidence: 99%

Estimation of skin elasticity by measuring surface wave velocity under impulse stimulus using compact optical sensors

Qiang

Zhang

2009

2009 IEEE International Ultrasonics Symposium

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Tissue elastography characterizes tissue mechanical properties, which can provide important information for diagnosis. While popular methods track shear wave propagation inside tissue, this paper proposes a method to estimate elasticity by measuring group velocity of the surface Raleigh wave. This method features noncontact, noninvasive and low-cost and have a great potential for clinic applications.By measuring the impulse response of a tissue simulating phantom at multiple points along the direction of surface wave propagation, the group velocity is estimated to be 12.61 m/s, therefore Young's modulus is 526 kPa. This result is consistent with the results obtained by Continuous Wave (CW) excitation.

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Continuous-wave ultrasound reflectometry for surface roughness imaging applications

Cited by 16 publications

References 18 publications

A Review of Vibro-acoustography and its Applications in Medicine

A Review of Vibro-acoustography and its Applications in Medicine

RGB representation of two-dimensional multi-spectral acoustic data for object surface profile imaging

Estimation of skin elasticity by measuring surface wave velocity under impulse stimulus using compact optical sensors

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