Time reversal of acoustic waves in the nonlinear regime: basic physics and application to ultrasound contrast imaging

2008 ◽  
Vol 123 (5) ◽  
pp. 3830-3830 ◽  
Author(s):  
Mickael Tanter ◽  
Olivier Couture ◽  
Mathias Fink
Keyword(s):  
Time Reversal ◽  
Acoustic Waves ◽  
Nonlinear Regime ◽  
Contrast Imaging ◽  
Ultrasound Contrast ◽  
Basic Physics ◽  
Ultrasound Contrast Imaging

Principles of Cerebral Ultrasound Contrast Imaging

2009 ◽  
Vol 27 (2) ◽  
pp. 14-24 ◽  
Author(s):  
Jeff Powers ◽  
Michalakis Averkiou ◽  
Matthew Bruce
Keyword(s):  
Contrast Imaging ◽  
Ultrasound Contrast ◽  
Cerebral Ultrasound ◽  
Ultrasound Contrast Imaging

Ultrasound Contrast Imaging of Prostate Tumors

2006 ◽  
pp. 309-316
Author(s):  
F. Forsberg ◽  
M. T. Ismail ◽  
E. K. Hagen ◽  
D. A. Merton ◽  
J. B. Liu ◽  
...  
Keyword(s):  
Contrast Imaging ◽  
Prostate Tumors ◽  
Ultrasound Contrast ◽  
Ultrasound Contrast Imaging

Growth and Dissolution of Encapsulated Microbubble Used in Ultrasound Contrast Imaging

2006 ◽  
Author(s):  
Pankaj Jain ◽  
Kausik Sarkar
Keyword(s):  
Surface Tension ◽  
Mole Fraction ◽  
Time Scale ◽  
Vital Role ◽  
Contrast Imaging ◽  
Shell Surface ◽  
Gas Concentration ◽  
Ultrasound Contrast ◽  
Osmotic Agent ◽  
Ultrasound Contrast Imaging

Steady dissolution of a bubble with two gases and a permeable shell has been modeled. At first the shell is modeled without elasticity. Factors such as permeability of the shell, surface tension, mole fraction of the osmotic agent, gas concentration in the bulk have been varied to study the growth and the time scale for dissolution of the bubble. It has been found that the inclusion of shell elasticity also plays a vital role in the growth and dissolution of the bubble.

Real-Time Excitation-Enhanced Ultrasound Contrast Imaging

2005 ◽  
Vol 27 (2) ◽  
pp. 65-74 ◽  
Author(s):  
Flemming Forsberg ◽  
William T. Shi ◽  
Michael K. Knauer ◽  
Anne L. Hall ◽  
Chris Vecchio ◽  
...  
Keyword(s):  
Real Time ◽  
Imaging Modality ◽  
Surrounding Tissue ◽  
Contrast Imaging ◽  
Maximum Enhancement ◽  
Ultrasound Contrast ◽  
Ultrasound Contrast Imaging ◽  
Contrast Microbubbles

A new nonlinear contrast specific imaging modality, excitation-enhanced imaging (EEI) has been implemented on commercially-available scanners for real-time imaging. This novel technique employs two acoustic fields: a low-frequency, high-intensity ultrasound field (the excitation field) to actively condition contrast microbubbles, and a second lower-intensity regular imaging field applied shortly afterwards to detect enhanced contrast scattering. A Logiq 9 scanner (GE Healthcare, Milwaukee, WI) with a 3.5C curved linear array and an AN2300 digital ultrasound engine (Analogic Corporation, Peabody, MA) with a P4-2 phased array transducer (Philips Medical Systems, Bothell, WA) were modified to perform EEI on a vector-by-vector basis in fundamental and pulse inversion harmonic grayscale modes. Ultrasound contrast microbubbles within an 8 mm vessel embedded in a tissue-mimicking flow phantom (ATS Laboratories, Bridgeport, CT) were imaged in vitro. While video intensities of scattered signals from the surrounding tissue were unchanged, video intensities of echoes from contrast bubbles within the vessel were markedly enhanced. The maximum enhancement achieved was 10.4 dB in harmonic mode (mean enhancement: 6.3 dB; p=0.0007). In conclusion, EEI may improve the sensitivity of ultrasound contrast imaging, but further work is required to assess the in vivo potential of this new technique.

Ultrasound contrast imaging: influence of scatterer motion in multi-pulse techniques

2013 ◽  
Vol 60 (10) ◽  
pp. 2065-2078 ◽  
Author(s):  
Fanglue Lin ◽  
Christian Cachard ◽  
Riccardo Mori ◽  
Francois Varray ◽  
Francesco Guidi ◽  
...  
Keyword(s):  
Contrast Imaging ◽  
Ultrasound Contrast ◽  
Ultrasound Contrast Imaging

P5B-4 Optimization of Chirp Reversal for Ultrasound Contrast Imaging

2007 ◽  
Author(s):  
A. Novell ◽  
S. M. van der Meer ◽  
M. Versluis ◽  
N. de Jong ◽  
A. Bouakaz
Keyword(s):  
Contrast Imaging ◽  
Ultrasound Contrast ◽  
Ultrasound Contrast Imaging
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