Ultrasound elasticity imaging: definition and technology

Bamber, Jeffrey C.

doi:10.1007/pl00014066

Cited by 37 publications

(25 citation statements)

References 9 publications

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“…Although work on ultrasonic assessment of tissue elasticity dates back to the 1970s (Bamber 1999), research on both of the above methods started at the same time in the early 1990s (Ophir et al 1991;Parker et al 1990Parker et al , 2011. The former was called the quasistatic method and the latter the dynamic method according to how the external mechanical excitation was applied, but subsequently these have been referred to as strain imaging and shear wave imaging, respectively, based on the measured quantity.…”

Section: Measured Physical Quantity and Excitation Methodsmentioning

confidence: 99%

WFUMB Guidelines and Recommendations for Clinical Use of Ultrasound Elastography: Part 1: Basic Principles and Terminology

Shiina

Nightingale

Palmeri

et al. 2015

Ultrasound in Medicine & Biology

796

604

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Conventional diagnostic ultrasound images of the anatomy (as opposed to blood flow) reveal differences in the acoustic properties of soft tissues (mainly echogenicity but also, to some extent, attenuation), whereas ultrasound-based elasticity images are able to reveal the differences in the elastic properties of soft tissues (e.g., elasticity and viscosity). The benefit of elasticity imaging lies in the fact that many soft tissues can share similar ultrasonic echogenicities but may have different mechanical properties that can be used to clearly visualize normal anatomy and delineate pathologic lesions. Typically, all elasticity measurement and imaging methods introduce a mechanical excitation and monitor the resulting tissue response. Some of the most widely available commercial elasticity imaging methods are 'quasi-static' and use external tissue compression to generate images of the resulting tissue strain (or deformation). In addition, many manufacturers now provide shear wave imaging and measurement methods, which deliver stiffness images based upon the shear wave propagation speed. The goal of this review is to describe the fundamental physics and the associated terminology underlying these technologies. We have included a questions and answers section, an extensive appendix, and a glossary of terms in this manuscript. We have also endeavored to ensure that the terminology and descriptions, although not identical, are broadly compatible across the WFUMB and EFSUMB sets of guidelines on elastography (Bamber et al. 2013; Cosgrove et al. 2013).

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Section: Measured Physical Quantity and Excitation Methodsmentioning

confidence: 99%

WFUMB Guidelines and Recommendations for Clinical Use of Ultrasound Elastography: Part 1: Basic Principles and Terminology

Shiina

Nightingale

Palmeri

et al. 2015

Ultrasound in Medicine & Biology

796

604

View full text Add to dashboard Cite

show abstract

“…Ultrasonic strain imaging, in which tumor stiffness is evaluated, is widely used as a useful tool for tumor diagnosis, especially in breast tissue [1][2][3][4]. To obtain a strain image, a static approach has been employed, in which the tumor is indirectly compressed from the surface using a transducer.…”

Section: Introductionmentioning

confidence: 99%

“…Skurczynski et al [12] experimentally analyzed the temperature rise and cavitation effect by performing focused ultrasound. The Japan Society of Ultrasonics in Medicine also reported a potential risk of temperature rise during elasticity measurement using ARF when bone exists in the focal spot, even if the MI and spatial-peak time-average intensity (I spta, 3 ) values are within the limits [13].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on temperature rise of acoustic radiation force elastography

Tabaru¹,

Yoshikawa²,

Azuma³

et al. 2012

J Med Ultrasonics

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“…In order to meet this challenge, imaging of viscoelastic properties of normal and diseased tissues is expanding and recently it has been clinically applied to a range of disease conditions. [7][8][9][10][11][12][13][14] This is carried out either by approaches that estimate displacement and strain or modulus reconstructions in response to a quasistatic deformation 1,3,[15][16][17][18] or dynamic approaches for reconstructing the mechanical properties of tissue using external vibration or methods that utilize localized acoustic radiation force to perturb small volumes of tissue. 4,10,[19][20][21] Krouskop et al 22 first reported the application of Doppler ultrasound for assessing the interaction of a prosthetic socket with an amputee's residual limb and the mechanical properties of soft tissue.…”

Section: Introductionmentioning

confidence: 99%

Tissue mimicking materials for the detection of prostate cancer using shear wave elastography: A validation study

et al. 2013

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Purpose: Quantification of stiffness changes may provide important diagnostic information and aid in the early detection of cancers. Shear wave elastography is an imaging technique that assesses tissue stiffness using acoustic radiation force as an alternate to manual palpation reported previously with quasistatic elastography. In this study, the elastic properties of tissue mimicking materials, including agar, polyacrylamide (PAA), and silicone, are evaluated with an objective to determine material characteristics which resemble normal and cancerous prostate tissue. Methods: Acoustic properties and stiffness of tissue mimicking phantoms were measured using compressional mechanical testing and shear wave elastography using supersonic shear imaging. The latter is based on the principles of shear waves generated using acoustic radiation force. The evaluation included tissue mimicking materials (TMMs) within the prostate at different positions and sizes that could mimic cancerous and normal prostate tissue. Patient data on normal and prostate cancer tissues quantified using biopsy histopathology were used to validate the findings. Pathologist reports on histopathology were blinded to mechanical testing and elastographic findings.

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Ultrasound elasticity imaging: definition and technology

Cited by 37 publications

References 9 publications

WFUMB Guidelines and Recommendations for Clinical Use of Ultrasound Elastography: Part 1: Basic Principles and Terminology

WFUMB Guidelines and Recommendations for Clinical Use of Ultrasound Elastography: Part 1: Basic Principles and Terminology

Experimental study on temperature rise of acoustic radiation force elastography

Tissue mimicking materials for the detection of prostate cancer using shear wave elastography: A validation study

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