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Shear wave elastography of the liver - review on normal values.

Shear wave elastography (SWE) has been developed to non-invasively estimate liver stiffness. Different techniques are available and they are described in detail in the EFSUMB guidelines on elastography. However, there are only a few published studies investigating normal ranges in healthy subjects by comparing different equipment and analysing influencing factors. In the present review, we summarize the impact factors on liver stiffness measurement (LSM) using SWE, report its reproducibility, and define normal range tables of LSM in healthy subjects for clinical practice according to the published literature.