Results 181 to 190 of about 7,225,697 (246)

Eco-Friendly Highly Sensitive Transducers Based on a New KNN–NTK–FM Lead-Free Piezoelectric Ceramic for High-Frequency Biomedical Ultrasonic Imaging Applications

IEEE Transactions on Biomedical Engineering, 2019
High-frequency ultrasonic imaging with improved spatial resolution has gained increasing attention in the field of biomedical imaging. Sensitivity of transducers plays a pivotal role in determining ultrasonic image quality.
Ruimin Chen, K. Shung, T. Ma, Qifa Zhou, Laiming Jiang, Tianfu Zhang, Takayuki Matsuoka, Masato Yamazaki, Xuejun Qian, Gengxi Lu, A. Safari, Jianguo Zhu   +11 more
semanticscholar   +1 more source

Ultrasonic imaging of multi-layer concrete structures

NDT & E international, 2018
Ultrasonic imaging is a powerful nondestructive evaluation technology for examining the condition of concrete structures through focused images obtained with the Synthetic Aperture Focusing Technique (SAFT).
Shibin Lin, Seyedmohammad S. Shams, Hajin Choi, Hoda Azari   +3 more
semanticscholar   +1 more source

Ultrasonic imaging of neoplasms

Cancer, 1976
Reflected ultrasound scanning (echography) is rapidly developing into a prime tool for tumor diagnosis, outlining, and detection. The principles of echographic diagnosis of neoplasms, the accepted uses in detection and diagnosis, as well as some of the principles of internal and contour patterns are discussed.
openaire   +2 more sources

Piezoelectric Micromachined Ultrasonic Transducer With Superior Acoustic Outputs for Pulse-Echo Imaging Application

IEEE Electron Device Letters, 2020
This article proposes a novel structured aluminum nitrate (AlN) thin film based piezoelectric micromachined ultrasonic transducer (PMUT) with superior ultrasonic performances that can directly be applied for pulse-echo imaging.
Yu Fu, Sheng Sun, Zhuochen Wang, Pengfei Niu, Menglun Zhang, Shili Chen, W. Pang   +6 more
semanticscholar   +1 more source

A multi-helical ultrasonic imaging approach for the structural health monitoring of cylindrical structures

Structural Health Monitoring, 2015
Salvatore Salamone
exaly   +2 more sources

Ultrasonic scatterer, ultrasonic imaging method and ultrasonic imaging apparatus

The Journal of the Acoustical Society of America, 2008
The ultrasonic scatterer of the invention comprises gas-containing particles having an average particle size of 0.01 μm to 10 μm, the ultrasonic imaging method of the invention comprises transmitting an ultrasonic wave continuing for ten cycles or more; transmitting an ultrasonic wave continuing for four cycles or more and less than ten cycles after a ...
openaire   +1 more source

Ultrasonic imaging method and ultrasonic imaging apparatus

The Journal of the Acoustical Society of America, 2004
Since a number of ultrasonic beams which are transmitted within unit time is increased, an ultrasonic imaging method is capable of obtaining image information in a high frame rate or improving resolution of the image information. In an ultrasonic imaging method of transmitting an ultrasonic beam toward a measurement target located within an object ...
openaire   +1 more source

ULTRASONIC IMAGING APPARATUS AND METHOD FOR ULTRASONIC IMAGING

The Journal of the Acoustical Society of America, 2013
A ultrasonic imaging apparatus comprises an ultrasonic probe including a plurality of ultrasonic transducers which perform ultrasonic transmission and reception to an object, a transceiver unit configured to obtain an ultrasonic signal from the object by driving the plurality of ultrasonic transducers, an ultrasonic data generation unit configured to ...
openaire   +1 more source

Ultrasonic imaging technologies in perspective

Journal of Medical Engineering & Technology, 2011
Ultrasonic imaging is a mature and widely used medical diagnostic technology but it is also a field of intense research activity. Innovations are viewed with differing perspectives by the stakeholders- users, industrialists, regulators, and researchers and research funders.
Peter N T, Wells, Hai-Dong, Liang, Terry P, Young   +2 more
openaire   +2 more sources

Registration of ultrasonic cardiac images

2005 IEEE Engineering in Medicine and Biology 27th Annual Conference, 2005
We describe an efficient approach to the registration problem of ultrasonic cardiac images using an affine transformation model, incorporating a mutual information based error minimisation. The affine motion model provides an analytic solution which has fast and stable convergence.
Tangwei, Liu, Huiyu, Zhou, Yusheng, Pang, Faquan, Lin, Ji, Wu   +4 more
openaire   +2 more sources