نتایج جستجو برای: ultrasonic imaging

تعداد نتایج: 482699  

Journal: :The Journal of the Acoustical Society of America 1978

Journal: :Biomedical Engineering Letters 2017

Journal: :Expert Review of Molecular Diagnostics 2006

Journal: :European Journal of Environmental and Civil engineering 2011

Journal: :Evidence report/technology assessment 2002
R T Meenan S Saha R Chou K Swarztrauber K P Krages M O'Keefee-Rosetti M McDonagh B K S Chan M C Hornbrook M Helfand

Specific interventions included in the review Studies of imaging strategies were eligible for inclusion: transthoracic echocardiography (TTE), transoesophageal echocardiography (TEE), carotid ultrasound (CUS), magnetic resonance imaging (MRA) and cerebral angiography. Other ultrasonic strategies and noninvasive carotid imaging techniques were excluded. The review also investigated the efficacy ...

2010
H. Karasawa T. Ikeda S. Matsumoto

3D ultrasonic inspection equipment “Matrixeye” can visualize defects as 3D image with good resolution by the 3D SAFT (Synthetic Aperture Focusing Technique) imaging method. High-speed 3D SAFT imaging process can be achieved by the developed parallel signal process of the ultrasonic echo data collected by a linear or a matrix-array ultrasonic probe. It has the following features. •3D image with ...

2015
Jui Fang Po-Hsiang Tsui

The hematocrit of a thrombus is a key factor associated with the susceptibility to thrombolysis. Ultrasonic imaging is currently the first-line screening tool for thrombus examinations. Different hematocrits result in different acoustical structures of thrombi, which alter the behavior of ultrasonic backscattering. This study explored the relationships among thrombolytic efficiencies, hematocri...

Journal: :European heart journal cardiovascular Imaging 2013
Tatsuya Kawasaki Michiyo Yamano Chieko Sakai Kuniyasu Harimoto Shigeyuki Miki Tadaaki Kamitani Hiroki Sugihara

AIMS Hypertrophic cardiomyopathy (HCM) patients often develop left--ventricular subendocardial ischaemia, a cause of chest symptoms, despite normal epicardial coronary arteries. The aim of this study was to examine whether ultrasonic tissue characterization or late gadolinium enhancement on cardiac magnetic resonance imaging can detect subendocardial ischaemia in patients with HCM. METHODS AN...

2016
Koichi Kakuma Koichi Mizutani H J Shin S C Hong J R Lee J H Kim

Most of aircraft antennas usually have various types of radome made of composite materials for protecting antenna structures. However, these antenna radome structures, which are installed on the outside of airplane, are easy to be damaged by external forces such as drag, foreign object, bird strike and others. In this study, full-field pulse-echo ultrasonic propagation imaging (PE UPI) system i...

2012
Fan Zheng Xiangyang Zhang Chi Tat Chiu Bill L. Zhou K. Kirk Shung Hao F. Zhang Shuliang Jiao

In this paper, we report our latest progress on proving the concept that ultrasonic phased array can improve the detection sensitivity and field of view (FOV) in laser-scanning photoacoustic microscopy (LS-PAM). A LS-PAM system with a one-dimensional (1D) ultrasonic phased array was built for the experiments. The 1D phased array transducer consists of 64 active elements with an overall active d...

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