Objective To explore sonographic features of the lower uterine segment cesarean section scar with early pregnancy,and to evaluate the diagnosis value of transvaginal ultrasound for lower uterine segment scar pregnancy.Methods The transvaginal color Doppler ultrasound was used in 15 cases of uterine scar pregnancy to check the next section to observe the location of the gestational sac,uterine incision site of the echo,the thickness of muscle scars,gestational sac and the uterine incision,and the relationship between blood flow distribution.Results In 15 cases of uterine scar pregnancy,ultrasound correctly diagnosed,14 cases of misdiagnosis,diagnostic coincidence rate was 93.3％.All patients with no intrauterine gestational sac surrounded by the trophoblast echogenic gestational sac audio and video,showed the lower uterine segment scar.We observed the scars were seen in the trophoblast with more abundant blood flow signals,measured by the CDFI RI of low resistance to blood flow,mean RI values less than 0.5.The imaging characteristics of the lower uterine segment scar in early pregnancy were divided into gestational sac integrity embedded in the scar at the embryo sac type,gestational sac to the intrauterine growth of the "tomato",three types of abortion harem cavity mixed echo.Conclusions Transvaginal ultrasound in the early lower uterine segment cesarean section scar pregnancy has important diagnostic value.

Objective To explore the diagnostic value of three-dimensional ultrasonography to fetal limb skeletal dysplasia. Methods From December 2005 to December 2009, the fetus with pregnancy of 14 to 40 weeks after routine ultrasound screening were given two dimensional prenatal ultrasound screening, and we found fetal limb skeletal growth abnormalities retained images, meanwhile we used three-dimensional ultrasound surface imaging mode and transparent imaging mode techniques, the location and types of malformations observed by these two kinds of methods were compared. Results Among the 38 974 cases, 70 cases of abnormalities detected by two-dimensional method, while 78 ones detected by three-dimensional ultrasound method, during postpartum follow-up study, 14 cases of miss diagnosis were found, including 4 cases of polydactylism, 2 cases of polydactyly, 2 cases of toe absence, 4 cases of syndactyly, and 2 cases of abnormal finger posture; while in those with three-dimensional ultrasound method, there were only 6 cases found as miss diagnosis, including polydactylism, polydactyly and syndactyly,2 cases for each. The detectable rate for fetal limb deformities of three-dimensional ultrasound was significantly higher than that of two-dimensional ultrasound method. The methods were mainly used to increase diagnostic accuracy for fetal fingers and toes deformities.Conclusions There is no obvious difference in fetal long bone deformity diagnosis between the methods of two-dimensional and three-dimensional ultrasound, but in the fetal fingers, toes and other details, the results of the three-dimensional ultrasound diagnosis is better than that of two-dimensional one. The three-dimensionul ultrasound diagnosis image is intuitive which provides convenience for communicating with pregnant women.