Elastographic parameters by surface wave analysis

Benech, N.; Núñez, I.; Negreira, Carlos

doi:10.1109/ultsym.2005.1603107

Cited by 5 publications

(5 citation statements)

References 7 publications

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“…Some of the existing methods to determine the elasticity of soft solids are destructive (Tensile tests, Warner-Bratzler test). Nondestructive methods include ultrasound elastography (USE) [1][2][3][4], magnetic resonance elastography (MRE) [5,6] and surface wave elastography (SWE) [7][8][9][10][11][12]. The Young's modulus of soft tissues in vivo is a param eter that provides information on health conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Previous works in SWE show the feasibility of estimating bulk elastic or viscoelastic parameters of soft tissues from surface wave measurements. Measurement methods include ultrasound [21], laser vibrometry [9,22], optic methods [8] and contact sensors [23]. Ultrasoundbased methods are usually employed to record surface displacements of inner organs or tissues, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Surface wave elastography: device and method

Benech¹,

Grinspan²,

Aguiar³

et al. 2019

Meas. Sci. Technol.

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Knowledge of the shear elasticity of soft tissues is relevant in many areas of medicine since some diseases correlate with changes in elasticity. Therefore, over the past 30 years, various noninvasive methods have been developed to estimate tissue elasticity. These methods are generally known as elastography. Most of them are ultrasound-based methods requiring specially adapted ultrasound scanners in order to quantify the elasticity. Elastography has the potential to add value and knowledge to other research areas like biomechanics, sports medicine or even the meat and/or agrifood industries. However, the existing solutions are not well adapted to those applications. Hence the need for a portable and reliable elastography method. In this work, we present a nonultrasound surface wave elastography device and method to estimate the shear elasticity of soft tissues. The method is based on surface wave propagation. Inversion algorithms were developed to retrieve the shear elasticity from the surface wave phase velocity in isotropic and transversely isotropic solids. The algorithms take into account near-field effects usually neglected in surface wave elastography. A detailed description of the device is given. The method was tested in tissue-mimicking phantoms and in beef samples. In addition, in vivo applications to estimate the biceps elasticity of two volunteers are shown. The obtained results are comparable to those obtained by other methods, such as shear wave elastography.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface wave elastography: device and method

Benech¹,

Grinspan²,

Aguiar³

et al. 2019

Meas. Sci. Technol.

View full text Add to dashboard Cite

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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%

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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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