Acoustic characterization of multi-element, dual-frequency transducers for high-intensity contact ultrasound therapy

2012 ◽  
Author(s):  
M. Burtnyk ◽  
W. A. N'Djin ◽  
L. Persaud ◽  
M. Bronskill ◽  
R. Chopra
Keyword(s):  
High Intensity ◽  
Ultrasound Therapy ◽  
Dual Frequency ◽  
Acoustic Characterization

scholarly journals Acoustic characterization of seafloor habitats on the western continental shelf of India

2007 ◽  
Vol 64 (3) ◽  
pp. 551-558 ◽  
Author(s):  
Bishwajit Chakraborty ◽  
Vasudev Mahale ◽  
Gajanan Navelkar ◽  
B. Ramalingeswara Rao ◽  
R. G. Prabhudesai ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Dual Frequency ◽  
Scattering Process ◽  
Backscatter Signal ◽  
Sediment Volume ◽  
Interface Scattering ◽  
Acoustic Characterization ◽  
Power Law Exponent ◽  
Different Grain Size

Abstract Chakraborty, B., Mahale, V., Navelkar, G., Rao, B. R., Prabhudesai, R. G., Ingole, B., and Janakirinam, G. 2007. Acoustic characterization of seafloor habitats on the western continental shelf of India. – ICES Journal of Marine Science, 64: 551–558. This is a study of the interaction effects of the dual-frequency (210 and 33 kHz) backscatter signal with seafloor sediment and benthic biota along a transect in water 27–83 m deep offshore of the Goa region of India's central west coast. Estimation of the power-law exponent using seafloor topographic data provided equivalent values even when using dual high-frequency systems for different grain-size sediments. Backscatter signals corrected from system-related gain, etc., reveal better correlations with sedimentary and benthic parameters than the estimated coherence parameters (using echo peaks). Statistically, correlations are significant for the 210 kHz backscatter signal with sand and calcium carbonate (CaCO3) sediment content. Also, correlations are higher for macrobenthic biomass (wet weight) and population density with a 210 kHz backscatter strength, emphasizing the dominant seawater–seafloor interface scattering process. For 33 kHz backscatter strength, the absence of such correlations indicates a different scattering process, i.e. dominant sediment volume scattering attributable to the comparatively lower signal attenuation. Additionally, to validate the results, the backscatter signals from other locations in the vicinity of this transect were considered.

scholarly journals Acoustic characterization of high intensity focused ultrasound fields: A combined measurement and modeling approach

2008 ◽  
Vol 124 (4) ◽  
pp. 2406-2420 ◽  
Author(s):  
Michael S. Canney ◽  
Michael R. Bailey ◽  
Lawrence A. Crum ◽  
Vera A. Khokhlova ◽  
Oleg A. Sapozhnikov
Keyword(s):  
High Intensity ◽  
Focused Ultrasound ◽  
High Intensity Focused Ultrasound ◽  
Modeling Approach ◽  
Acoustic Characterization

Sci-Sat AM(2): Brachy - 06: Characterization of Dual-Frequency, Multi-Element Heating Applicators for MRI-Guided Transurethral Ultrasound Therapy

2010 ◽  
Vol 37 (7Part3) ◽  
pp. 3911-3911
Author(s):  
L Persaud ◽  
WA N'Djin ◽  
M Burtnyk ◽  
M Bronskill ◽  
R Chopra
Keyword(s):  
Ultrasound Therapy ◽  
Dual Frequency ◽  
Mri Guided ◽  
Transurethral Ultrasound

Acoustic characterization of high intensity focused ultrasound fields generated from a transmitter with a large aperture

2014 ◽  
Vol 115 (11) ◽  
pp. 114902 ◽  
Author(s):  
Tao Chen ◽  
Tingbo Fan ◽  
Wei Zhang ◽  
Yuanyuan Qiu ◽  
Juan Tu ◽  
...  
Keyword(s):  
High Intensity ◽  
Focused Ultrasound ◽  
High Intensity Focused Ultrasound ◽  
Large Aperture ◽  
Acoustic Characterization

Acoustic Characterization of Marine Sediments

1997 ◽  
Author(s):  
Anatoliy N. Ivakin ◽  
Darrell R. Jackson
Keyword(s):  
Marine Sediments ◽  
Acoustic Characterization
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