Ultrasonic Imaging Using the Instantaneous Frequency of Pulse-Echo Signals

1985 ◽  
pp. 487-496 ◽  
Author(s):  
D. A. Seggie ◽  
G. M. Doherty ◽  
S. Leeman ◽  
L. A. Ferrari
Keyword(s):  
Instantaneous Frequency ◽  
Ultrasonic Imaging ◽  
Pulse Echo

Speckle reduction in pulse-echo ultrasonic imaging using a two-dimensional receiving array

1992 ◽  
Vol 39 (2) ◽  
pp. 167-173 ◽  
Author(s):  
J.J. Giesey ◽  
P.L. Carson ◽  
D.W. Fitting ◽  
C.R. Meyer
Keyword(s):  
Ultrasonic Imaging ◽  
Speckle Reduction ◽  
Two Dimensional ◽  
Pulse Echo

scholarly journals Medical ultrasound: imaging of soft tissue strain and elasticity

2011 ◽  
Vol 8 (64) ◽  
pp. 1521-1549 ◽  
Author(s):  
Peter N. T. Wells ◽  
Hai-Dong Liang
Keyword(s):  
Soft Tissue ◽  
Soft Tissues ◽  
Ultrasonic Imaging ◽  
Low Frequency ◽  
Radiation Force ◽  
Breast Disease ◽  
Published Data ◽  
Tissue Strain ◽  
Low Frequency Vibration ◽  
Pulse Echo

After X-radiography, ultrasound is now the most common of all the medical imaging technologies. For millennia, manual palpation has been used to assist in diagnosis, but it is subjective and restricted to larger and more superficial structures. Following an introduction to the subject of elasticity, the elasticity of biological soft tissues is discussed and published data are presented. The basic physical principles of pulse-echo and Doppler ultrasonic techniques are explained. The history of ultrasonic imaging of soft tissue strain and elasticity is summarized, together with a brief critique of previously published reviews. The relevant techniques—low-frequency vibration, step, freehand and physiological displacement, and radiation force (displacement, impulse, shear wave and acoustic emission)—are described. Tissue-mimicking materials are indispensible for the assessment of these techniques and their characteristics are reported. Emerging clinical applications in breast disease, cardiology, dermatology, gastroenterology, gynaecology, minimally invasive surgery, musculoskeletal studies, radiotherapy, tissue engineering, urology and vascular disease are critically discussed. It is concluded that ultrasonic imaging of soft tissue strain and elasticity is now sufficiently well developed to have clinical utility. The potential for further research is examined and it is anticipated that the technology will become a powerful mainstream investigative tool.

scholarly journals Nonlinear ultrasonic imaging in pulse-echo mode using Westervelt equation: a preliminary research

2019 ◽  
Vol 24 (sup2) ◽  
pp. 54-61
Author(s):  
Wuxuan Chen ◽  
Peng Wang ◽  
Zhihong Zhang ◽  
Xudong Deng ◽  
Congyao Zhang ◽  
...  
Keyword(s):  
Ultrasonic Imaging ◽  
Nonlinear Ultrasonic ◽  
Westervelt Equation ◽  
Preliminary Research ◽  
Pulse Echo

A novel ultrasonic-imaging based temperature estimation approach by instantaneous frequency detection

2008 ◽  
Author(s):  
Hao-Li Liu ◽  
Meng-Lin Li ◽  
Tzu-Ching Shih ◽  
Sheng-Min Huang ◽  
I-Yeh Lu ◽  
...  
Keyword(s):  
Instantaneous Frequency ◽  
Ultrasonic Imaging ◽  
Temperature Estimation ◽  
Frequency Detection

Transmission Type Ultrasonic Imaging of Horizontal Two-Phase Flow

2010 ◽  
Author(s):  
Jen-Shih Chang
Keyword(s):  
Void Fraction ◽  
Two Phase Flow ◽  
Ultrasonic Transducer ◽  
Ultrasonic Imaging ◽  
Stratified Flow ◽  
Sound Frequency ◽  
Parameter Determination ◽  
Phase Flow ◽  
Two Phase ◽  
Pulse Echo

Ultrasonic technique was widely applied for the measurement of two-phase flow, however, the majority techniques deal primary with pulse echo technique under higher operating sound frequency in a MHz order since higher accuracy can be obtain for the dynamic gas-liquid interface locations. On the other hand the transmission type ultrasonic methods was also developed for bubbly flow diagnostics for the time and cross sectional averaged void fraction measurement or bubble two-phase flow parameter determination by pulse echo techniques with higher operating sound frequency in a MHz order. In this work, the transmission type ultrasonic imaging of horizontal two-phase flow was experimentally investigated. Ultrasonic transducer used is 150 kHz and time averaged void fraction results for stratified flow was compared with capacitance void measurement and ultrasonic pulsed echo techniques. The results show that the transmission intensity for the stratified flow pattern decreases with increasing void fraction until 55% of void then increases with increasing void fraction till 100%. An application to plug, slug and annular flow regime also investigated in detail.

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