What is the difference between FibroScan and shear wave elastography?
FibroScan® is a non-invasive device that assesses the ‘hardness’ (or stiffness) of the liver via the technique of transient elastography. Liver hardness is evaluated by measuring the velocity of a vibration wave (also called a ‘shear wave’) generated on the skin.
How accurate is liver elastography?
However, ultrasound elastography is only moderately accurate in the assessment of mild-to-moderate hepatic fibrosis. In our studies, the accuracy of TE was as high as 90% and 93% in the diagnosis of cirrhosis in patients having chronic hepatitis B and C.
What is the main clinical indication for liver elastography?
The main clinical indication for liver elastography is fibrosis staging of chronic liver disease (eg, chronic viral hepatitis and screening patients with NAFLD to rule out nonalcoholic steatohepatitis), with a main objective of determining the presence or absence of advanced fibrosis.
Is F2 liver fibrosis reversible?
It is important to accurately differentiate mild (F1) and moderate fibrosis (F2) stages from normal liver (F0) for liver fibrosis can be treatable and reversible in its early stages. Transient elastography can be reliable in the assessment of liver fibrosis [11].
How long does a liver elastography take?
The sound waves are recorded, measured, and displayed on a monitor. The measurement shows the level of stiffness in the liver. The procedure only takes about five minutes, but your entire appointment may take a half hour or so.
How much does a liver elastography cost?
The cost for liver elastography is $100, and is typically covered by Medicare and most insurance plans. Referring physicians who have questions about ultrasound elastography can contact Dr.
How is elastography performed?
Liver elastography involves the use of a surface ultrasound probe that delivers a low frequency pulse or shear wave to a small volume of liver tissue under the rib cage. The transmission of the sound wave is completely painless.
Is F2 liver fibrosis life expectancy?
Similar results were seen for overall mortality. The lower end of the 95% CI for the 10th percentile of time to development of severe liver disease was 22-26 years in F0-1, 9.3 years in F2, 2.3 years in F3, and 0.9 years to liver decompensation in F4.
How is shear wave elastography used to measure liver stiffness?
Shear-wave elastography ( SWE) uses measurement of acoustically generated tissue shear wave propagation speeds to derive estimates of liver stiffness, with the advantage of simultaneous anatomic B-mode US imaging ( 16 ). This allows selection of a liver parenchymal region of interest devoid of blood vessels or focal lesions for analysis.
What kind of elastography is used for liver fibrosis?
The recent development of ultrasound elastography techniques allows a non-invasive method of estimating the degree of liver fibrosis. Transient elastography (TE) is a non-imaging elastographic technique, while point shear wave (p-SWE) and 2D-SWE combine imaging with elastography.
How are shear waves related to liver fibrosis?
The principle behind the interpretation of shear wave elastography is that shear waves produced by a focused ultrasound beam are directly related to the stiffness of the liver from where they are generated[5,7,8]. SWE is also reportedly more accurate than TE in assessing significant fibrosis (≥ F2)[8,9].
How to assess the accuracy of shear wave elastography ( Swe ) alone?
To assess the accuracy of shear wave elastography (SWE) alone and in combination with aminotransferase platelet ratio index (APRI) score in the staging of liver fibrosis. A multicenter prospective study was conducted to assess the accuracy of SWE (medians) and APRI to predict biopsy results.