ribs, which lead to absorption of the ultrasound waves, and is filled with air, which also contributes massively to artifacts. However, due to continuous improvements in science as well technology, transthoracic ultrasound has now established as a standard imaging tool in pulmonary medicine, too [2] . Over the past 7 decades, ultrasound has evolved into a versatile tool in medicine. Over half a...

Ultrasound imaging can be considered as an inverse scattering problem in which the unknown distribution of the material parameters mass density and compressibility is reconstructed from measurements of scattered waves on the borders around the object. Unfortunately, this inverse problem is mathematically ill-posed and nonlinear: While the wave propagation is considered linear, the mapping of ma...

al’s properties and acoustical characteristics have been studied for a long time and ultrasonic techniques have been used in non-destructive testing and imaging for decades. Ultrasound as an analytical tool has revolutionised diagnostics in medicine, but the application of ultrasound to material’s analyses has been held back by problems with ultrasonic design, electronics, sample handling, comp...

This work deals with the evaluation of thin layers by a technique called ultrasound interferometry, which is based on the resonance and antiresonance of ultrasound waves verified in the presence of some interfaces having different acoustical impedances. A Graphical User Interface (GUI), developed in matlab was used to simulate the calculation of several coating thicknesses over different substr...

Biological effects of megahertz-frequency diagnostic ultrasound are thoroughly monitored by professional societies throughout the world. A corresponding, thorough, quantitative evaluation of the archival literature on the biological effects of low-frequency vibration is needed. Biological effects, of course, are related directly to what those exposures do physically to the tissue-specifically, ...

in this study, independent variables were time (1-15 min0, temperature (25-45) and power of ultrasound. results showed that time of ultrasound was linear (p

Ultrasound is a form of mechanical energy with its acoustic pressure wave at frequencies range from 20 to 20,000 Hz. To date, ultrasound waves are not only used in imaging medicine for diagnosis, but also are performed in physical therapy (PT) medicine for the purpose of preventing and curing disease due to its thermal and nonthermal effects, and the ultrasound frequencies used in PT are typica...

This article reviews two types of ultrasound-mediated biophotonic imaging-acousto-optical tomography (AOT, also called ultrasound-modulated optical tomography) and photo-acoustic tomography (PAT, also called opto-acoustic or thermo-acoustic tomography)-both of which are based on non-ionizing optical and ultrasonic waves. The goal of these technologies is to combine the contrast advantage of the...

Cutaneous ultrasound imaging has recently gained ground in dermatology as it has in other specialties (urology, rheumatology, and anesthesiology, for example). Already available to dermatologists in some centers, this tool provides images that can complement the clinical visit, whether for diagnosis or following a patient’s response to a course of treatment. When ultrasound waves emitted by a t...

SOUND WAVES with frequencies greater than 20,000 cycles per second are above the limits of sound audible to the human ear and, therefore, are designated as ultrasound. Over the past several years ultrasonic irradiation has been widely employed as a form of treatment in physical medicine.' Concurrently, other uses of ultrasound have been developed that utilize the particular transmission charact...