Results 11 to 20 of about 3,334 (156)
Ultrasound in Obstetrics &Gynecology, Volume 59, Issue 4, Page 437-449, April 2022., 2022 ABSTRACT Objective To develop a standardized sonographic evaluation and reporting system for Cesarean scar pregnancy (CSP) in the first trimester, for use by both general gynecology and expert clinics. Methods A modified Delphi procedure was carried out, in which 28 international experts in obstetric and gynecological ultrasonography were invited to ...
I. P. M. Jordans +18 more
wiley +1 more source
First‐trimester ultrasound detection of fetal heart anomalies: systematic review and meta‐analysis
Ultrasound in Obstetrics &Gynecology, Volume 59, Issue 1, Page 11-25, January 2022., 2022 ABSTRACT Objectives To determine the diagnostic accuracy of ultrasound at 11–14 weeks' gestation in the detection of fetal cardiac abnormalities and to evaluate factors that impact the detection rate. Methods This was a systematic review of studies evaluating the diagnostic accuracy of ultrasound in the detection of fetal cardiac anomalies at 11–14 ...
J. N. Karim +26 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 58, Issue 2, Page 293-302, August 2021., 2021 ABSTRACT Objectives Preterm birth (PTB) accounts for two‐thirds of deaths of structurally normal babies and is associated with substantial lifetime healthcare costs. Prevention of PTB remains limited by the modest accuracy of prediction methods, namely transvaginal ultrasound (TVS) cervical length (CL) measurement and quantitative cervicovaginal fetal ...
D. O. C. Anumba +4 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 55, Issue 2, Page 264-268, February 2020., 2020 ABSTRACT Objective To investigate how many examinations it takes to be able to identify the pelvic parts of the ureters on transvaginal sonography (TVS). Methods This was a prospective study including consecutive women attending a gynecological outpatient clinic in a tertiary referral setting.
M. K. Aas‐Eng +5 more
wiley +1 more source
Developmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019 目的 本国际临床指南由欧洲残疾儿童学会（the European Academy of Childhood Disability，EACD）牵头制定，旨在解决发育性协调障碍（developmental coordination disorder，DCD）的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题，通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础，以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类，最终转化为指南建议。并由国际 ...
Jing Hua +6 more
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 5, Page 624-632, May 2025.ABSTRACT Objectives Placental insufficiency contributes to many obstetric pathologies, but there is no bedside clinical tool to evaluate placental perfusion. We have developed a method to acquire multiple three‐dimensional (3D) power Doppler (PD) ultrasound (US) volumes of placental vasculature, with infrared camera tracking of the precise spatial ...
A. Xue +5 more
wiley +1 more source
Research on Key Issues in Eddy Current Nondestructive Evaluation of Residual Stress in Aluminum Alloy [PDF]
, 2015 铝合金作为制造业发展的基础材料，在航空航天、高速铁路、建筑工程、船舶制造、汽车工业等支柱产业中有着重要地位。残余应力往往是造成铝合金结构破坏的重要因素。有效的评价应力状态，特别是导致损伤出现的临界应力状态是评价设备结构强度、可靠性的重要依据。传统的无损检测方法已广泛应用于工程实际中，但大部分局限于对已成型的缺陷进行检测。对于可能导致损伤出现的隐性、不规律变化的残余应力状态的评价则较为困难。 目前，应用较多的残余应力检测法主要有盲孔法、X射线法、超声波法以及磁测法。这些方法在使用上都存在很大的局限性 ...
汪涛
core
Calculation of Young's Modulus and Coefficient of Linear Expansion on Several Solid Solution with Cubic Structure [PDF]
, 2015 杨氏模量和线膨胀系数是表征金属材料重要的物理量。但是，目前已有的二元及多元合金固溶体的杨氏模量和线膨胀系数的实验数据十分有限。因此，利用合理的理论模型来实现对杨氏模量和线膨胀系数的计算并建立性能数据库十分重要，能够为材料设计提供必要的基础信息。本课题组在应用相图计算技术建立热力学数据库和指导合金的成分设计方面取得了不错的成效。本研究基于相图计算的研究方法，考虑温度和成分两个变量的影响，开展合金溶体相的杨氏模量和线膨胀系数的计算。其具体研究成果如下： (1)借鉴计算相图(CALPHAD)方法的研究思路 ...
林明娜
core
Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 3, Page 303-310, March 2025.ABSTRACT Objective Globally, one in four pregnant women is classified as overweight or obese, based on their prepregnancy body mass index (BMI). Obese pregnant women are at increased risk of adverse pregnancy outcomes and long‐term cardiovascular disease that occurs earlier in life.
M. Charakida +6 more
wiley +1 more source
Numerical Simulation And Experiment Study On Magnetoacoustic Emission with Magnetic Induction [PDF]
, 2015 铝合金板材具有高强度、低密度、强耐腐蚀、高断裂韧性和良好的高低温特性等优点，是制造宇宙飞船、运载火箭、飞机、舰船、坦克、装甲车和高速列车的主要材料。然而，由于加工工艺限制，铝合金板材在生产过程中不可避免地存在分层、夹杂、裂纹和氧化膜等缺陷。无损检测技术是一种在不破坏待测物材质与性能前提下实现构件质量检测的技术，目前已在许多领域成为确保产品质量和可靠性的强制性措施。 本文研究的感应式磁声发射无损检测方法是利用线圈在导体感应出的涡流在静态磁场的作用下会受到洛仑兹力的作用使导体发生机械振动，进而产生磁声信号 ...
李超
core