Objective:To explore the normal reference value range of normal fetal lung volume and lung weight to body weight ratio(FLB) in the second trimester and third trimester,and to evaluate the correlation between fetal lung volumes and gestational age.Methods:198 gestational age 18 ～39 +6weeks fetal left and right lung volumes were measured by three-dimensional ultrasound VOCAL rotation technology.Fetal weight was assessed by two-dimensional ultrasound and Hadlock equation system.FLB were calculated.The normal reference value range of normal fetal lung volume and FLB were calculated.The correlation between fetal lung volumes and gestational age was assessed by Pearson correlation analysis.Results:The volumes of left lung,right lung and total lung increased with the increase of gestational age and body weight.The volumes of left lung,right lung and total lung were highly correlated with gestational age and fetal weight(The left lung volume,r =0.970,P ＜0.001.The right lung volume,r =0.972,P ＜ 0.001.The total lung volume,r =0.970,P ＜ 0.001.),and the correlation coefficient was 0.970,0.972,0.970,0.978,0.984,0.979.The FLB did not change with gestational age,and the normal range was about 0.026-0.032.Conclusions:The fetal lung volumes increase with the increase of gestational age and fetal weight in second trimester and third trimester.The normal reference range of fetal lung volume and FLB can provide important theoretical basis for evaluation of fetal lung development.

目的：探讨运用三维超声第三平面观察及测量小脑蚓部；方法：利用三维超声第三切面对379例孕22-35周正常孕妇进行小脑蚓部大小及面积测量；结果：对正常孕妇进行测量的小脑蚓部随着孕周增大，面积也逐渐增大，二者呈正相关。结论：三维超声第三切面进行小脑蚓部测量，方法简单，重复性高，可在小脑蚓部发育畸形方面发挥更大价值。

目的 探讨二维超声及彩色多普勒超声对乳腺癌腋窝淋巴结的定性诊断价值.方法 对108例乳腺癌患者肿块及腋窝行超声检查,观察患者乳腺肿块及腋窝淋巴结,记录淋巴结大小、形态、内部回声、血流分布方式,评价淋巴结性质,对其结果与术后病理结果进行对照.结果 在108例乳腺癌患者中,二维超声下观察,纵横比L/S≤2者占转移性淋巴结77.1％,占非转移性淋巴结26.7％;内部回声不均匀者占转移性淋巴结70.8％,占非转移性淋巴结33.3％;皮质增厚者占转移性淋巴结60.4％,占非转移性淋巴结23.3％.3种指标比较差异有统计学意义(P＜0.05).彩色多普勒超声判定淋巴结转移与否的敏感度、特异度、准确度分别为54.2％、53.3％、53.7％.结论 二维超声较彩色多普勒超声具有较高定性诊断价值,两者联合应用诊断价值更高.