3Maymon R, Strauss S, Vaknin Z,et al. Normal sonographie values of mater nal spleen size throughout pregnancy[J]. Ultrasound Med Biol, 2006,32(12) :1827-1831.
4Spielmann AL,DeLong DM, Kliewer MJL Sonographic evaluation of spleen size in tall athletes[J].Am J Roentgenol,2005, 184(1) :45-49.
5Sonmez G,Ozturk E,Basekim CC Effects of altitude on spleen vol umerSonographic assessment [J]. J Clin Ultrasound, 2007, 35 (4) : 182-185.
6Quaia E,Alaimo V,Baratella E,et al. Effect of observer experience in the differentiation between benign and malignant liver tumors after ultrasound contrast agent injection[J]. J Ultrasound Med ,2010,29( 1 ) :25-36.
7Claudan M, Cosgrove D, Albrecht T,et al. Guidelines and good clinical practice reeommendations for contrast enhanced ultrasound (CEUS) - up- (late 2008[J]. Uhraschall Med ,2008,29( 1 ) :28- 44.
8Bolondi L,Gaiani S,Celli N ,et al. Characterization of small nodules in cirrhosis by assessment of vascularity : the problem of hypnvaseular hepatocellular carcinoma[J]. Hepatology .2005,42 ( 1 ) : 27-34.
9Bartolotta T V, Midiri M,Galia M ,et al. Characterization of benign hepatic tumors arising in fatty liver with SonoVue and pulse inversion US[J]. Abdom Imaging, 2007,32 ( 1 ) : 84-91.
10Ungermann L,Elias P,Zizka J,et al. Focal nodular hyperplasia: spoke-wheel arterial pattern and other signs on dynamic contrast-enhanced ultrasonography[J]. Eur J Radiol, 2007,63 (2) : 290-294.
