3Noguchi T,Yoshimitsu K,Yoshida M.Periappendiceal hyperechoic structure on sonography-a sign of severe appendicitis[J].J Ultrasound Med,2005,24(3):323-327.
4Gracey D,Mc Clure MJ.The impact of ultrasound in suspected acute appendicitis[J].Clin Radiol,2007,62(6):573-578.
5Himeno S,Yasuda S,Oida Y,et al.Ultrasonography for the diagnosis of acute appendicitis[J].Tokai J Exp Clin Med,2003,28(1):39-44.
6Pacharn P,Ying J,Linam LE,et al.Sonography in the evaluation of acute appendicitis[J].J Ultrasound Med,2010,29(12):1749-1755.
7Trout AT,Sanchez R,Ladino-Torres MF,et al.A critical evaluation of US for the diagnosis of pediatric acute appendicitis in a real-life setting:how can we improve the diagnostic value of sonography?[J].Pediatr Radiol,2012,42(7):813-823.
8Mardan MA,Mufti TS,Khattak IU,et al.Role of ultrasound in acute appendicitis[J].J Ayub Med Coll Abbottabad,2007,19(3):72-78.
