Ultrasonic imaging has applications in many industries, such as non destructive testing, medical imaging, and industrial applications. Previous research into ultrasonic imaging has focused on offline processing of echo data. A topic of increasing interest is real-time processing of ultrasonic data. Due to the microstructure of materials the echo signal contains a high amount of clutter noise. I...

When averaged over sources or disorder, cross correlation of diffuse fields yields the Green's function between two passive sensors. This technique is applied to elastic ultrasonic waves in an open scattering slab mimicking seismic waves in the Earth's crust. It appears that the Rayleigh wave reconstruction depends on the scattering properties of the elastic slab. Special attention is paid to t...

In a microfluidic ultrasonic separator device, the microchannel geometry is inherently angular due to the anisotropic etch processes used. A CFD model is used to investigate eddy formation induced by this angular geometry. Results are applicable to various microfluidic devices and show that certain etch patterns significantly reduce eddy formation. © 2005 Elsevier B.V. All rights reserved.

Ultrasonic blades have been shown to cause less acute electrophysiological damage when applied near nerves than monopolar electrosurgery (ES). This study was performed to determine whether the acute nerve damage observed for ES, as well as the relative lack of damage observed for ultrasonic dissection, extends through a subacute timeframe. Muscle incisions were made in rat with the Harmonic(®) ...

OBJECTIVE On April 25, 2012, the first laparoscopic cordless ultrasonic device (Sonicision, Covidien, Mansfield, Massachusetts) was used in a clinical setting. We describe our initial experience. METHODS The cordless device is assembled with a reusable battery and generator on a base hand-piece. It has a minimum and maximum power setting controlled by a single trigger for both coagulation and...

Background. Laparoscopic surgery has become more widely used, but peritoneal dissemination and port-site metastasis have been reported to occur in these surgeries. One reason for these problems is the ultrasonically activated scalpel (UAS) used for laparoscopic surgery. This study aimed to investigate the viability of airborne cells released during cancer dissection using a UAS. Methods. Flank ...

In this study, an in-duct ultrasonic airflow measurement device has been designed, developed and tested. The airflow measurement results for a small range of airflow velocities and temperatures show that the accuracy was better than 3.5% root mean square (RMS) when it was tested within a round or square duct compared to the in-line Venturi tube airflow meter used for reference. This proof of co...