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Elastography: history, principles, and technique comparison

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Abstract

Elastography is a relatively new imaging technology that creates images of tissue stiffness. It can be thought of an extension of the ancient technique of palpation but it gives better spatial localization information and is less subjective. Two main types of elastography are currently in use, strain elastography where the tissue displacement in response to gentle pressure is used to compute and image tissue strain, and shear wave elastography where the speed of shear waves traversing tissue is measured and used to create an image of tissue stiffness. Each method has advantages and disadvantages but generally strain imaging is excellent for focal lesions and shear wave imaging, being more quantitative, is best for diffuse organ diseases. Strain imaging requires additional training in acquisition technique to obtain high quality images. Pitfalls to avoid and tips for good images are provided. Improvements in strain imaging are focused on better quality indicators and better methods for quantification. Improvements in shear wave imaging will be higher frame rates, greater accuracy in focal lesions, and making results more comparable between different ultrasound systems. Both methods will continue to improve and will provide ever more powerful new tools for diagnosis of diffuse and focal diseases.

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Authors and Affiliations

  1. Washington DC VA Medical Center, Washington, DC, USA

    Brian S. Garra

  2. US Food and Drug Administration, Silver Spring, MD, USA

    Brian S. Garra

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  1. Brian S. Garra
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Correspondence to Brian S. Garra.

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Garra, B.S. Elastography: history, principles, and technique comparison. Abdom Imaging 40, 680–697 (2015). https://doi.org/10.1007/s00261-014-0305-8

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