Suppression of propagating second harmonic in ultrasound contrast imaging

1998 ◽  
Vol 45 (3) ◽  
pp. 704-711 ◽  
Author(s):  
S. Krishnan ◽  
J.D. Hamilton ◽  
M. O'Donnell
Keyword(s):  
Second Harmonic ◽  
Contrast Imaging ◽  
Ultrasound Contrast ◽  
Ultrasound Contrast Imaging

scholarly journals Contrast Improvement in Sub- and Ultraharmonic Ultrasound Contrast Imaging by Combining Several Hammerstein Models

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Fatima Sbeity ◽  
Sébastien Ménigot ◽  
Jamal Charara ◽  
Jean-Marc Girault
Keyword(s):  
Contrast Agent ◽  
Second Harmonic ◽  
Ultrasound Contrast Agents ◽  
Hammerstein Model ◽  
Contrast Imaging ◽  
Ultrasound Contrast ◽  
Hammerstein Models ◽  
Alternative Modality ◽  
Ultrasound Contrast Imaging ◽  
Harmonic Components

Sub- and ultraharmonic (SUH) ultrasound contrast imaging is an alternative modality to the second harmonic imaging, since, in specific conditions it could produce high quality echographic images. This modality enables the contrast enhancement of echographic images by using SUH present in the contrast agent response but absent from the nonperfused tissue. For a better access to the components generated by the ultrasound contrast agents, nonlinear techniques based on Hammerstein model are preferred. As the major limitation of Hammerstein model is its capacity of modeling harmonic components only, in this work we propose two methods allowing to model SUH. These new methods use several Hammerstein models to identify contrast agent signals having SUH components and to separate these components from harmonic components. The application of the proposed methods for modeling simulated contrast agent signals shows their efficiency in modeling these signals and in separating SUH components. The achieved gain with respect to the standard Hammerstein model was 26.8 dB and 22.8 dB for the two proposed methods, respectively.

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.

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