Fig. 3From: Performance of spleen stiffness measurement by 2D-shear wave elastography in evaluating the presence of high-risk varices: comparative analysis of idiopathic portal hypertension versus hepatitis B virusa Histogram and b Tukey box show the distribution of spleen stiffness values measured by using 2D-SWE in HBV-infected patients. Dots in b show individual patient spleen stiffness values, the box boundaries show the first and third quartile values, and the whiskers show 1.5 times the interquartile rangeBack to article page