Results 21 to 30 of about 173,652 (295)

Discrete Imaging Models for Three-Dimensional Optoacoustic Tomography using Radially Symmetric Expansion Functions [PDF]

, 2014
Optoacoustic tomography (OAT), also known as photoacoustic tomography, is an emerging computed biomedical imaging modality that exploits optical contrast and ultrasonic detection principles.
Er Oraevsky, Kun Wang, Mark A. Anastasio, Richard Su, Robert W. Schoonover, Senior Member   +5 more
core   +1 more source

Laser Ultrasound Inspection Based on Wavelet Transform and Data Clustering for Defect Estimation in Metallic Samples [PDF]

, 2019
Laser-generated ultrasound is a modern non-destructive testing technique. It has been investigated over recent years as an alternative to classical ultrasonic methods, mainly in industrial maintenance and quality control procedures.
Cojocaru, Crina, Delgado Prieto, Miquel, Mohamed Selim, Hossameldin, Romeral Martínez, José Luis, Trull Silvestre, José Francisco   +4 more
core   +2 more sources

A Novel Relative Position Estimation Method for Capsule Robot Moving in Gastrointestinal Tract

Sensors, 2019
Recently, a variety of positioning and tracking methods have been proposed for capsule robots moving in the gastrointestinal (GI) tract to provide real-time unobstructed spatial pose results.
Min Wang, Qinyuan Shi, Shuang Song, Chao Hu, Max Q.-H. Meng   +4 more
doaj   +1 more source

Breast-Lesion Characterization using Textural Features of Quantitative Ultrasound Parametric Maps [PDF]

, 2017
© 2017 The Author(s). This study evaluated, for the first time, the efficacy of quantitative ultrasound (QUS) spectral parametric maps in conjunction with texture-analysis techniques to differentiate non-invasively benign versus malignant breast lesions.
A Ahmed, A Heindl, A König, A Sadeghi-Naini, A Sadeghi-Naini, A Sadeghi-Naini, A Sadeghi-Naini, A Sadeghi-Naini, A Sadeghi-Naini, AV Alvarenga, B Sigel, D Sengupta, E Feleppa, EJ Feleppa, EJ Feleppa, EJ Feleppa, EJ Feleppa, EJ Feleppa, F Davnall, FL Lizzi, FL Lizzi, FLL Lizzi, H Tadayyon, H Tadayyon, H Tadayyon, H Tadayyon, J Mamou, JPB O’Connor, K Polyak, KA Wear, KA Wear, KC Balaji, L Sannachi, LX Yao, M Vaidya, MJ Gerdes, ML Oelze, ML Oelze, ML Oelze, ML Oelze, ML Oelze, N Duric, N Sannomiya, R Natrajan, RJ Lavarello, RL Siegel, RM Haralick, S Chicklore, S Tan, T Cover, T Noritomi, TJ Larkin, V Goh, Y Labyed, Y Labyed, Y-Y Liao   +55 more
core   +2 more sources

Computers in ultrasonic imaging [PDF]

Journal of Digital Imaging, 1992
This article describes the role of computers and digital electronics in state-of-the-art diagnostic ultrasound scanners. An overview of the computational requirements is provided, and limits on color flow image frame rates are discussed. The new scanner architectures emerging may be used to extend current limitations of ultrasonography, making features
T J, Hall, S J, Rosenthal, M F, Insana, A W, Templeton   +3 more
openaire   +2 more sources

Early Diagnosis of Abnormal Left Ventricular Systolic Functions of Rare Pathogenic Titin Mutation Gene Carriers in FHCM by Three-Dimensional Speckle Tracking Echocardiography Combined with Gene Detection

International Journal of Clinical Practice, 2022
Objective. This study aimed to explore the early diagnosis of abnormal left ventricular systolic function of rare pathogenic titin (TTN) mutation gene carriers in familial hypertrophic cardiomyopathy (FHCM) by three-dimensional speckle tracking ...
Xiang-hong Luo, Rui Zhu, Qian Chen, Pei-hong Shi, Li-sha Na   +4 more
doaj   +1 more source

Sound Field Modeling Method and Key Imaging Technology of an Ultrasonic Phased Array: A Review

Applied Sciences, 2022
An ultrasonic phased array consists of multiple ultrasonic probes arranged in a certain regular order, and the delay time of the excitation signal sent to each array element is controlled electronically.
Qian Xu, Haitao Wang
doaj   +1 more source

An annular array with fiber composite microstructure for far field NDT imaging applications [PDF]

, 2010
This paper describes the design and fabrication of a reduced element count annular array for far field NDT imaging applications, built with a random fiber piezoelectric composite microstructure.
Dziewierz, J., Gachagan, A., O'Leary, R.L., Ramadas, S.N., Velichko, A., Wilcox, P.D.   +5 more
core   +1 more source

A match coefficient approach for damage imaging in structural components by ultrasonic synthetic aperture focus [PDF]

, 2017
Ultrasonic Synthetic Aperture Focus (SAF) techniques are commonly used to image structural defects. In this paper, a variation of SAF based on ideas borrowed from Matched Field Processing (MFP) is evaluated to reduce artifacts and sidelobes of the ...
Lanza di Scalea, F., Montanini, R, Pau, Annamaria, Quattrocchi, A, Sternini, S   +4 more
core   +1 more source

Multi Spherical Wave Imaging Method Based on Ultrasonic Array

Sensors, 2022
The imaging range of traditional plane wave imaging is usually limited by the directivity of the plane wave. In this paper, a multi spherical wave imaging method based on an ultrasonic array is proposed, which radiates both compression and shear waves in
Zhi-Ying Liu, Ping Zhang, Bi-Xing Zhang, Wen Wang   +3 more
doaj   +1 more source