Results 21 to 30 of about 23,736 (254)

Flexible ultrasonic transducers

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2006
Flexible ultrasonic transducers (UTs) consisting of a metal foil, a piezoelectric ceramic film, and a top electrode have been developed. The flexibility is realized owing to the porosity of piezoelectric film and the thinness of metal foil. In this paper, the stainless steel (SS), lead-zirconate-titanate (PZT)/PZT composite and silver paste were chosen
Kobayashi, M., Jen, C.-K., Lévesque, D.
openaire   +4 more sources

Measurement of a 3D Ultrasonic Wavefield Using Pulsed Laser Holographic Microscopy for Ultrasonic Nondestructive Evaluation

Sensors, 2018
In ultrasonic array imaging, 3D ultrasonic wavefields are normally recorded by an ultrasonic piezo array transducer. Its performance is limited by the configuration and size of the array transducer.
Xing Wang, Guang-Ming Zhang, Hongwei Ma, Yishu Zhang, Doudou Wang   +4 more
doaj   +1 more source

Two-Dimensional Photoacoustic/Ultrasonic Endoscopic Imaging Based on a Line-Focused Transducer

Frontiers in Bioengineering and Biotechnology, 2022
Existing acoustic-resolution photoacoustic/ultrasonic endoscopy (PA/USE) generally employs a point-focused transducer for ultrasound detection, which is only sensitive in its focal region, thus the lateral resolution and sensitivity drop dramatically ...
Weiran Pang, Weiran Pang, Yongjun Wang, Lili Guo, Bo Wang, Puxiang Lai, Jiaying Xiao   +6 more
doaj   +1 more source

Development and Investigation of High-Temperature Ultrasonic Measurement Transducers Resistant to Multiple Heating–Cooling Cycles

Sensors, 2023
Usually for non-destructive testing at high temperatures, ultrasonic transducers made of PZT and silver electrodes are used, but this could lead to damage to or malfunction of the ultrasonic transducer due to poor adhesion between PZT and silver ...
Vaida Vaskeliene, Reimondas Sliteris, Rymantas Jonas Kazys, Egidijus Zukauskas, Liudas Mazeika   +4 more
doaj   +1 more source

Functional Materials for ICE and IVUS Piezoelectric Transducers: A Review

Sensors
This review paper provides a comprehensive overview of the functional materials and assembly technologies used in intracardiac echocardiography (ICE) and intravascular ultrasound (IVUS) transducers.
Dayong He, Baihezi Ye
doaj   +1 more source

Design and Performance Analysis of Capacitive Micromachined Ultrasonic Transducer Linear Array

Micromachines, 2014
An ultrasonic transducer is a key component to achieve ultrasonic imaging. This paper designs a new type of Microelectromechanical Systems (MEMS) based capacitive ultrasonic transducer and a linear array based on the transducer.
Hongliang Wang, Xiangjun Wang, Changde He, Chenyang Xue   +3 more
doaj   +1 more source

Ultrasonic Detection of Transversal Cracks in Rail Heads – Theoretical Approach

Engineering Transactions, 2021
In the paper the calculation of ultrasonic field generated by the transmitting transducer and the pulse-echo amplitude received after beam reflection at the defect in tested material is presented.
Tomasz KATZ, Sławomir MACKIEWICZ, Zbigniew RANACHOWSKI, Zbigniew L. KOWALEWSKI, Łukasz ANTOLIK   +4 more
doaj   +1 more source

Capacitive Micromachined Ultrasonic Transducers (CMUTs) for Underwater Imaging Applications

Sensors, 2015
A capacitive micromachined ultrasonic transducer structure for use in underwater imaging is designed, fabricated and tested in this paper. In this structure, a silicon dioxide insulation layer is inserted between the top electrodes and the vibration ...
Jinlong Song, Chenyang Xue, Changde He, Rui Zhang, Linfeng Mu, Juan Cui, Jing Miao, Yuan Liu, Wendong Zhang   +8 more
doaj   +1 more source

Numerical and experimental analysis of focused air-coupled ultrasonic transducer based on cross-linked polypropylene film

AIP Advances, 2022
Air-coupled ultrasonic transducers based on novel piezoelectrets with extremely small acoustic impedance have some distinctive advantages including no coupling agent, flexibility, and eco-friendliness, compared to conventional ultrasonic transducers ...
Feng Li, Yuxuan Zhang, Yongdong Pan, Jinfeng Zhao, Xiaoqing Zhang   +4 more
doaj   +1 more source

Circulating microRNA signatures of cachexia and cancer in Canis familiaris as a comparative oncology model for human disease

Molecular Oncology, EarlyView.
Circulating microRNAs as biomarkers of cachexia and sex‐specific cancer in senior dogs. In 25 client‐owned dogs, four circulating miRNAs (miR‐15a, miR‐15b, miR‐16, miR‐140) were downregulated in cachexia, with miR‐16 the strongest individual biomarker (AUC = 0.899).
Soon‐Seok Park, Kyongman An, Gyeonghwa Kim, Soo‐Nyun Choi, Hong‐Ki Lee, Keun Hur, Kyu‐Shik Jeong   +6 more
wiley   +1 more source