 - Hitachi Real Time Ultrasound Elastography is performed using the 5-1 MHz EUP convex transducer from Hitachi Preirus equipment Hitachi Aloka Medical Tokyo, Japan. Dual imaging is set in such a manner as to be visible on the screen in a 2D image as well as in an elastographic image juxtaposed over the 2D image. The examination is underwent through two points: intercostally through the right lobe and epigastrically through left hepatic lobe. The examination is done through post-expiratory apnea without compression on the probe. The interest region ROI is set at 4cm2, 1 cm under the liver capsule. The aria of interest is chosen so that the 2D image is as clear as possible, the large vessels avoided and the artifacts given by ribs and lungs. For each patient, 10 images are chosen with two entry points intercostally and epigastrically. For each image the 11 parameters given by the Strain Histogram measurement software are used: mean relative strain value MEAN; standard deviation of relative strain value SD; percentage of low strain area percentage of blue color area - AREA; complexity of low strain area calculated as perimeter 2 area - COMP; skewness SKEW; kurtosis KURT; contrast CONT; entropy ENT; textural complexity, inverse difference moment IDM; angular second moment ASM; Correlation CORR indicates the feature value of the texture directivity. 