 - ARFI- Acoustic Radiation Force Impulse Technology ACUSON S2000. Scanning is performed with a right intercostal approach, in the right liver lobe, segment V-VIII, 1-2 cm under the liver capsule, with minimal scanning pressure applied by the operator, while the patients is asks to stop normal breathing for a moment, in order to minimize breathing motion. The operator selects the depth at which the liver elasticity is evaluated by placing a measuring box 10 mm long, 5 mm wide in the desired area. The maximum depth at which ARFI measurements can be performed is 8 cm. A total of 10 valid measurements performe in every patient and a median value in ms is calculate. 