4Dillon EH,Feyock AL,Taylor KL.Pseudogestational sacs:Doppler US differentiation from normal or abnormal intrauterine pregnancies[J].Radiology,1990,176(2):359-364.
5Wherry KL,Dubinsky TJ,Waitches GM.Low-resistance endometrial arterial flow in the exclusion of ectopic pregnancy revisited[J].J Ultrasound Med,2001,20(4):335-342.
6Ahmed AA,Tom BD,Calabrese P.Ectopic pregnancy diagnosis and the pseudo-sac[J].Fertil steril,2004,81(5):1225-1228.
7Dart RG,Burke G,Dart L.Subclassification of indeterminate pelvic ultrasonography:prospective evaluation of the risk of ectopic pregnancy[J].Ann Emerg Med,2002,39(4):382-388.
8Hammoud AO,Hammoud I,Bujold E,et al.The role of sonographic endometrial patterns and endometrial thickness in the differential diagnosis of ectopic pregnancy[J].Am J Obstet Gynecol,2005,192(5):1370-1375
9Levgur M,Tsai T,Kang K,et al.Endometrial stripe thickness in tubal and intrauterine pregnancies[J].FertilSteril,2000,74(5):889-891.
10Dart RG,Dart L,Mitchell P,et al.The predictive value of endometrial stripe thickness in patients with suspected ectopic pregnancy who have an empty uterus at ultrasonography[J].Acad Emerg Med,1999,6(6):602-608.