Results 41 to 50 of about 320,358 (152)

齿底疲劳裂纹超声波检测装置

, 2021
本发明实施例涉及一种齿底疲劳裂纹超声波检测装置，包括：样品台底座(1)、微型调速电机(2)、多个可伸缩三爪弹簧夹臂(3)、超声波检测探头(4)和超声波探伤仪(5)，以及待测环形带齿部件(6)；其中，所述微型调速电机(2)的一端固定于所述样品台底座(1)上，所述微型调速电机(2)的另一端与多个所述可伸缩三爪弹簧夹臂(3)连接，在多个所述可伸缩三爪弹簧夹臂(3)中的一个上设置有超声波检测探头(4)，所述超声波检测探头(4)的一端与所述超声波探伤仪(5)连接，多个所述可伸缩三爪弹簧夹臂(3 ...
蓝鼎, 宁克焱, 韩明, 魏炳忱, 胡铮, 张万昊, 王洋, 张坤   +7 more
core   +1 more source

超声造影增强模式对甲状腺良恶性结节的鉴别诊断价值

Zhongguo shiyan zhenduanxue, 2015
目前,随着超声检查技术的广泛应用,甲状腺结节的检出率不断提高[1,2],其中约有5%-15%为恶性结节[3]。常规超声鉴别甲状腺良恶性结节具有重要价值,已成为首选影像学检查方法[4],但仍存在一定局限性,如良、恶性结节二维超声特征存在交叉重叠[5],超声造影(CEUS)作为当前超声检查的一项新技术,可以提供常规超声不能反映的微血管信息,观察结节的增强模式 ...
王洋, 滕登科, 隋国庆, 林元强, 张博茗, 赵倩倩, 王辉   +6 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

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

用超声波检测信号预报抽油杆剩余寿命 [PDF]

, 2005
目前研究抽油杆剩余寿命的理论方法没有一种可直接应用于现场,无法直接通过工程检测手段来判断抽油杆的剩余寿命。为此,通过抽油杆疲劳试验,找出裂纹前缘的变化规律,得出裂纹深度与裂纹面积之间的关系、裂纹面积与剩余寿命的关系,借用传统Paris公式的数学模型,通过超声波检测建立了超声波探伤信号与裂纹深度之间的关系式,即裂纹检测信号与裂纹扩展规律之间的关系,从而提出了直接利用超声波探伤信号确定抽油杆剩余寿命的方法。将研究结果与疲劳模拟试验得出的剩余寿命相比较,寿命预测符合率达84 ...
丁建东, 孟宪红, 姚红星, 石惠宁, 王睿, 陈金芳   +5 more
core   +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  

Prenatal evaluation, diagnosis and management of fetal corpus callosal abnormalities: international Delphi consensus

Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 5, Page 582-588, November 2025.
ABSTRACT Objective The corpus callosum (CC) is an interhemispheric structure that facilitates communication between the two cerebral hemispheres. Anomalies of the CC are frequent and associated with a wide spectrum of altered neurodevelopmental outcomes.
R. Corroenne, D. Paladini, I. Papastefanou, R. Chaoui, L. Pomar, L. Guibaud, K. Krajden Haratz, R. K. Pooh, M. Herrera, R. Ximenes, G. Azumendi, G. Pilu, L. J. Salomon, Collaborators, G. Turkyilmaz, D. L. Rolnik, W. Sepulveda, G. Rizzo, R. Llorens, S. Meagher, B. Tutschek, M. Aertsen, S. Agarwal, T. Tarui, E. Scola, D. Pretorius, A. Henry, J. Binder, E. R. Guzman, C. Rodo, A. Schiattarella, K. Grossman, S. Bakalis, J. Pascual‐Mancho, E. Eixarch, P. Galati, D. Bittencourt Sodré Barmpas, M. Savvidou, B. M. E. Adriaanse, M. T. Izquierdo, V. Cecotti, N. Sananès, D. Muresan, D.‐G. Iliescu, V. Faure‐Bardon, R. Has, C. Batukan, S. Ahmet Erol, A. Seval Ozgu‐Erdinc, B. Kapudere, E. Toprak, M. Akalin, S. Özeren, H. Golbasi, B. Kaya, B. Strizek   +55 more
wiley   +1 more source

抽油杆疲劳裂纹的超声波检测法

, 2003
本文将超声波探伤方法应用于抽油杆疲劳裂纹检测,建立了基于非接触式水浸超声探伤、双向斜置线聚焦探头、轴向—切向运动分离三个关键技术的抽油杆疲劳裂纹检测方法,并对不同深度的人工裂纹进行了检测实验,对检测信号进行了分析 ...
冯玮, 姚红星, 石惠宁, 柳春图
core   +1 more source

Effect of aspirin on maternal hemodynamics in Chinese women at high risk for preterm pre‐eclampsia: longitudinal study

Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 5, Page 621-630, November 2025.
ABSTRACT Objectives To compare the maternal hemodynamics of Chinese women at low and at high risk for preterm pre‐eclampsia (PE) and assess the differences in hemodynamic parameters between high‐risk women with or without prophylactic aspirin. Methods This was a prospective longitudinal case–control study of 857 Chinese women with a singleton pregnancy
X. Wang, J. Lin, Y. Chen, I. S. Wong, J. Liu, F. Liu, S. L. Lau, Q. Zhang, X. Xu, D. S. Sahota, A. P. W. Lee, L. C. Poon   +11 more
wiley   +1 more source

二维超声心动图诊断房间隔缺损(附143例手术结果对比分析) [PDF]

, 1988
本文报告我院自1980年1986年应用M型及二维超声心动图(2DE)诊断复经手术证实为房间隔缺损(ASD)143例,并将超声探测结果与手术结果对比分析,探讨其临床诊断价值。 资料与方法 本组143例,男65,女78,年龄平均16.3岁(15天～45岁),全部病例术前超声心动图、X光胸部照片、心音图检查,其中43例做心导管检查。心内直视手术证实为ASD,包括继发孔ASD 120例,原发孔型ASD 23例,合并心脏其他畸形89例。 检查方法 应用日本Aloka SSD—720型机械扇形超声诊断仪 ...
阙绪光
core