Transient elastography (TE)is the reference method to identify liver stiffness (LSM) but fails to obtain a measurement in 3% of cases and results are considered unreliable in 16%. The aim of this study is to evaluate the applicability and diagnostic accuracy of TE performed by trained operators (\<500 explorations), after a second evaluation by experienced explorers (\>500 explorations) and after a third exploration using XL probe. Inadequate LSM will be re-evaluated by experienced operators with the M (standard size) probe. A third register will be performed with XL (obese size) probe in those patients with inadequate M probe determination. Diagnostic accuracy will be estimated in patients with liver biopsy to identify significant fibrosis with a TE cut-off value of 7.6 kPa (kilo pascal).
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Applicability of transient elastography (TE)
Timeframe: Will be calculated after evaluation of all included patients with M probe by trained operators (at baseline and after 48 weeks), M probe by experienced operators after 72 weeks and XL probe after 72 weeks.