9Claudon M,Cosgrove D,Albrecht T,et al.Guidelines and good clinical practice recommendations for contrast enhanced ultrasound(CEUS):update 2008[J].Ultraschall Med,2008,29(1):28-44.
4Whiting P,Rutjes AW,Reitsma JB,et al.The development of QUADAS:a tool for the quality assessment of studies of diagnostic accuracy included in systematic reviews[J].BMC Med Res Methodol,2003,3:25.
5Balthazar EJ,Birnbaum BA,Yee J,et al.Acute appendicitis:CT and US correlation in100 patients[J].Radiology,1994,190(8):31-35.
6Pickuth D,Heywang-Kobrunner SH,Spielmann RP.Suspected acute appendicitis:is ultrasonography or computed tomography the preferred imaging technique[J]?Eur J Surg,2000,166(5):315-319.
7Wise SW,Labuski MR,Kasales CJ,et al.Comparative assessment of CT and sonographic techniques for appendiceal imaging[J].AJR Am J Roentgenol,2001,176(4):933-941.
8Kan JH,Fines BP,Funaki B.Conventional and hydrocolonic US of the appendix with CT correlation performed by on-call radiology residents[J].Acad Radiol,2001,8(8):1208-1214.
9Poortman P,Lohle PN,Schoemaker CM,et al.Comparison of CT and sonography in the diagnosis of acute appendicitis:a blinded prospective study[J].AJR Am J Roentgenol,2003,181(9):1355-1359.
10Keyzer C,Zalcman M,De Maertelaer V,et al.Comparison of US and unenhanced multi-detector row CT in patients suspected of having acute appendicitis[J].Radiology,2005,236(2):527-534.