Results 31 to 40 of about 257,716 (153)

超声检查联合CA125、OPN检测在卵巢癌诊断中的应用

Zhongguo shiyan zhenduanxue, 2020
目的探讨超声检查联合糖类抗原125(CA125)、骨桥蛋白(OPN)检测在卵巢癌诊断中的应用价值。方法选取2017年1月至2018年3月在我院治疗的卵巢肿瘤患者89例,其中良性肿瘤51例,恶性肿瘤38例,均采用彩色超声检查,同时检测血清CA125和OPN水平。结果超声检查诊断卵巢癌灵敏度、特异度、阳性预测值和阴性预测值分别为76.32%、92.16%、87.88%和83.93%;恶性肿瘤患者血清CA125和OPN分别为143.92(34.38,210.29)U/ml和167.28(41.29,200 ...
季春艳, 曾艳, 程瑶瑶, 窦礼敏
doaj  

Transvaginal ultrasound for detecting parametrial involvement in suspected deep pelvic endometriosis: updated meta‐analysis

Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 1, Page 7-14, January 2026.
ABSTRACT Objective To perform an updated meta‐analysis evaluating the diagnostic performance of transvaginal ultrasound (TVS) for detecting lateral parametrial involvement in women with suspected deep pelvic endometriosis. Methods A literature search was performed in the Web of Science, PubMed and Scopus databases from January 2021 to May 2024 for ...
J. L. Alcázar, C. Montoya, C. Candau, C. Catalan, R. Orozco, M. Á. Pascual, S. Ajossa, S. Guerriero   +7 more
wiley   +1 more source

超声法在支柱瓷绝缘子探伤中的应用

Dianci bileiqi, 2007
支柱瓷绝缘子存在的缺陷严重威胁电网的安全运行。介绍了采用超声法对支柱绝缘子进行探伤的基本原理,探伤方法主要有纵波斜角超声波检测和爬波超声波检测两种,纵波斜角超声波检测速度较慢,但可检测瓷件的中心部位;爬波超声波检测速度较快,探测表面下1～15mm的裂纹非常敏感。列举了采用爬波方法在现场检测的实例,建议:在停电时间允许的情况下,应结合爬波和纵波两种方法对支柱绝缘子内部的缺陷进行全面检测。检测时,根据瓷瓶的大小,选择合适尺寸的探头。同时还应根据被检瓷件的材料（高强瓷或普通瓷）,选择同类别的试块和探头。
王勇, 印华, 王谦, 吴高林
doaj  

Endometrial assessment in abnormal uterine bleeding: transvaginal ultrasound alone may not be good enough

Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 1, Page 79-88, January 2026.
ABSTRACT Objective To evaluate the proportion of optimal assessments of endometrial thickness (ET) achieved by transvaginal ultrasound (TVS) compared with a multimodal (MM) sonographic approach in women with abnormal uterine bleeding (AUB). Methods This prospective observational study was a subset of the EPI‐SURE study conducted between June and ...
S. Nijjar, S. Kastora, A. Bajrami, S. Solangon, M. Widschwendter, D. Jurkovic   +5 more
wiley   +1 more source

非接触式超声波检测10kV线路绝缘子事故隐患的应用探讨

Dianci bileiqi, 2014
目前10 kV柱式瓷绝缘子局部放电带电测试主要依靠红外测温,针对此方法缺陷检出率低的弊端提出了非接触式超声波检测方法。在简单介绍了超声波产生、传播、检测原理的基础上对超声波传感器和声聚能器进行了设计和选型,同时对检测灵敏度的影响因素进行了试验研究。结果表明:传感器最宜采用中心频率为40 kHz的压电陶瓷传感器;信号定向聚焦、远程拾音采用抛物面聚焦方式进行;检测最佳距离为48 m;检测角度不得超过40°。
王俊波, 余红波, 陈贤熙, 张伟忠   +3 more
doaj  

Performance of non‐invasive prenatal testing in vanishing‐twin and multiple pregnancies: results of TRIDENT‐2 study

Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 6, Page 738-746, December 2025.
ABSTRACT Objective To evaluate the performance of non‐invasive prenatal testing (NIPT) in vanishing‐twin and multiple pregnancies. Methods This study was conducted as part of the TRIDENT‐2 study, in which NIPT was offered as a first‐tier screening test to women with a multiple pregnancy or vanishing‐twin pregnancy between 1 June 2020 and 31 March 2023 ...
J. C. A. van Eekhout, C. J. Bax, L. van Prooyen Schuurman, E. C. Becking, A. J. E. M. van der Ven, D. Van Opstal, E. M. J. Boon, M. V. E. Macville, M. N. Bekker, R. J. H. Galjaard, on behalf of the Dutch NIPT Consortium, E.A. Sistermans, L. Henneman, A. Polstra, E. Voorhoeve, S.L. Zelderen‐Bhola, E.M.J. Boon, M.P.R. Lombardi, M.C. Bakker, E.J. Bradley, E.M.J. Boon, C. Louwerens‐Zintel, M. Smit, M.C. van Maarle, M.B. Tan‐Sindhunata, K. van der Meij, H. Meij, C.J. Bax, E. Pajkrt, I.H. Linskens, L. Martin, J.T. Gitsels‐van der Wal, R. J. H. Galjaard, D. van Opstal, M.I. Srebniak, F.M. Sarquis Jehee, I.H.I.M. Hollink, F. Sleutels, W. de Valk, W.H. Deelen, A.M.S. Joosten, K.E.M. Diderich, M.E. Redeker, A.T.J.I. Go, M.F.C.M. Knapen, S. Galjaard, A.K.E. Prinsen, A.P.G. Braat, M.J.V. Hoffer, N.S. den Hollander, E.J.T. Verweij, M.C. Haak, M.V.E. Macville, S.J.C. Stevens, A. van der Wijngaard, L.H. Houben, M.A.A. van Esch‐Lennarts, L. Hamers, A.G.P. Jetten, S.A.I. Ghesquiere, B. de Koning, M. Zamani Esteki, C.J. Heesterbeek, C.E.M. de Die‐Smulders, H. Brunner, M.J. Pieters, A.B.C. Coumans, D.F.C.M. Smeets, B.H.W. Faas, D. Westra, M.M. Weiss, I. Derks‐Prinsen, I. Feenstra, M. van Rij, E. Sikkel, R.F. Suijkerbuijk, B. Sikkema‐Raddatz, I.M. van Langen, K. Bouman, L.K. Duin, G.H. Schuring‐Blom, K.D. Lichtenbelt, M.N. Bekker, E. van Vliet‐Lachotzki, J. Pot, A. J. E. M. van der Ven, S van 't Padje   +86 more
wiley   +1 more source

TA15钛合金激光熔化沉积制件超声相控阵检测

, 2020
为了确保激光增材制件的质量安全,对其进行可靠的无损检测与评价尤为重要。针对TA15钛合金激光熔化沉积制件,使用常规超声以及超声相控阵检测技术对其内部缺陷进行检测,重点研究了激光增材制件内部缺陷的超声检测特性以及超声相控阵检测技术在增材制件上的应用优势。使用激光熔化沉积技术制备了含有熔合不良缺陷的试验样件,从XYZ 3个方向分别对样件进行了全面检测。结果表明,激光增材制件内部的缺陷具有明显的方向性,因此,为了确保激光增材制件检测结果可靠,应从XYZ 3个方向分别进行全面检测。相比与常规超声检测 ...
何振丰, 赵吉宾, 赵宇辉, 王志国, 孙长进   +4 more
core  

一起GIS内部部件松动故障的在线检测与诊断

Gaoya dianqi, 2010
为尽早发现GIS内部部件松动,避免设备发生局部放电、内部击穿等严重故障,研究了应用超声法和超高频法对GIS内部部件松动进行在线综合检测与诊断,提出了检测的详细步骤:首先利用超声法按周期对GIS设备的关键位置进行检测;再利用超高频法对超声幅值异常区域进行检测;最后将超声幅值最大位置和设备内部结构图进行比对分析,确定松动部件。最后用案例证明了该方法的有效性。
高树国, 刘海峰, 潘瑾, 耿江海, 刘宏亮, 武坤   +5 more
doaj  

Impact of fetal and maternal characteristics on the accuracy and precision of sonographic fetal weight estimation: population‐based study

Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 6, Page 747-753, December 2025.
ABSTRACT Objective Ultrasound‐based fetal growth assessment is an essential part of clinical decision‐making in modern obstetric care. This study aimed to evaluate the impact of maternal and fetal characteristics on the accuracy and precision of sonographic fetal weight estimation.
M. Granfors, Ä. Mantel, O. Axelsson, S. Cnattingius, L. Lindström   +4 more
wiley   +1 more source

基于超声相控阵的增材制造零件缺陷的检测方法

, 2020
本发明公开了一种基于超声相控阵的增材制造零件缺陷的检测方法，属于超声无损检测技术领域。该方法采用超声相控阵检测系统进行，选择合适的超声相控阵检测仪器、探头、楔块、对比试块以及耦合剂；在数据采集分析软件上创建检测组、设置聚焦法则、校准声速延迟、校准灵敏度和创建TCG曲线；采用手动扫查方式，对零件进行100％检测；最后对检测信息进行采集保存并进行分析。本发明超声相控阵检测通过将多个检测晶片集成于一个探头，可大大提高检测效率 ...
何振丰, 赵吉宾, 赵宇辉, 孙长进, 王志国   +4 more
core