Results 261 to 270 of about 133,430 (295)

Piezoelectrically actuated flextensional micromachined ultrasound transducers

Ultrasonics, 2002
This paper presents novel micromachined two-dimensional array piezoelectrically actuated flextensional transducers that can be used to generate sound in air or water. Micromachining techniques to fabricate these devices are also presented. Individual unimorph array elements consist of a thin piezoelectric annular disk and a thin, fully clamped ...
Gökhan, Perçin, Butrus T, Khuri-Yakub
openaire   +2 more sources

High frequency piezoelectric MEMS ultrasound transducers

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2007
High-frequency ultrasound array transducers using piezoelectric thin films on larger structures are being developed for high-resolution imaging systems. The increase in resolution is achieved by a simultaneous increase in operating frequency (30 MHz to about 1 GHz) and close coupling of the electronic circuitry.
Ioanna G, Mina, Hyunsoo, Kim, Insoo, Kim, Sung Kyu, Park, Kyusun, Choi, Thomas N, Jackson, Richard L, Tutwiler, Susan, Trolier-McKinstry   +7 more
openaire   +2 more sources

Novel Airborne Ultrasound Transducer

1995
A novel transducer capable of transmitting and receiving airborne ultrasonic radiation at sub-mm wavelengths has been demonstrated experimentally in our laboratories to have significant advantages over alternative devices. The radiated beam profile is shown to depend directly on the characteristics of leaky Lamb waves propagating in immersed plates ...
H. Dabirikhah, C. W. Turner
openaire   +1 more source

Ultrasound transducer mounting assembly

The Journal of the Acoustical Society of America, 2002
The present invention provides a mounting assembly, for use with an ultrasound transducer attached to an ultrasound machine, for determining the spacial relationship between a succession of 2D image slices of a target of a subject, generated by the ultrasound machine.
openaire   +1 more source

Dual frequency band ultrasound transducer arrays

The Journal of the Acoustical Society of America, 2010
Ultrasound probes that transmits/receives ultrasound pulses with frequencies both in a low frequency (LF) and a high frequency (HF) band, where the radiation surfaces of said HF and LF bands at least have a common region. Several solutions for transmission (and reception) of LF and HF pulses through the same radiation surface are given.
openaire   +1 more source

Ultrasound transducer assembly and method for manufacturing an ultrasound transducer assembly

2015
Microelectronics
Dekker, R. (author), Henneken, V.A. (author), Louwerse, M.C. (author), Raganato, M.F. (author)   +3 more
openaire   +1 more source

Quadruple ultrasound, photoacoustic, optical coherence, and fluorescence fusion imaging with a transparent ultrasound transducer

Proceedings of the National Academy of Sciences of the United States of America, 2021
Jeongwoo Park, Byullee Park, Tae Yeong Kim   +2 more
exaly  

Reducing nosocomial infections in ultrasound - cleaning ultrasound transducers

2017
Aims and objectives: Seven to ten procent of patients in Denmark incur a nosocomial infection. It is assumed that there can be a high risk of nosocomial infections at an ultrasound examination, due to the direct contact between the patient skin and the ultrasound...
openaire   +1 more source

Piezoelectric Micromachined Ultrasound Transducer Technology: Recent Advances and Applications

Biosensors, 2023
Haotian Wan, Xiaoning Jiang, Chang Peng
exaly  

Fabrication and high acoustic performance of high frequency needle ultrasound transducer with PMN-PT/Epoxy 1-3 piezoelectric composite prepared by dice and fill method

Sensors and Actuators A: Physical, 2021
Xiangyong Zhao, Feifei Wang
exaly