1.Limitations and artifacts in shear-wave elastography of the liver.
Matthew BRUCE ; Orpheus KOLOKYTHAS ; Giovanna FERRAIOLI ; Carlo FILICE ; Matthew O'DONNELL
Biomedical Engineering Letters 2017;7(2):81-89
Recent studies have shown that real-time, two-dimensional shear-wave elastography (2D-SWE) can monitor liver fibrosis by measuring tissue elasticity (i.e., elastic modulus). Two clinical studies of 2D-SWE in the liver have shown that there are several practical issues that can compromise quantitation of liver tissue elasticity. Both general ultrasound (US) limitations and limitations in the 2D-SWE method itself resulted in significant variability in estimated liver elasticity. The most common US limitations were: poor acoustic window, limited penetration, and rib/lung shadows. The most common 2D-SWE limitations were: reverberations under the liver capsule, respiratory/cardiac motion, and vessel pulsation/loss of SWE signal. Based on these studies, scan protocols have been optimized to minimize the influence of these limitations on liver elasticity quantification. These refined protocols should move non-invasive SWE closer to becoming the preferred tool to diagnose and manage many chronic diseases of the liver.
Acoustics
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Artifacts*
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Chronic Disease
;
Elasticity
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Elasticity Imaging Techniques*
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Fibrosis
;
Liver Cirrhosis
;
Liver*
;
Methods
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Ultrasonography