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Therapeutic ultrasound refers generally to any type of ultrasonic procedure that uses ultrasound for therapeutic benefit. Physiotherapeutic ultrasound was introduced into clinical practice in the 1950s, with lithotripsy introduced in the 1980s. Others are at various stages in transitioning from research to clinical use: HIFU, targeted ...
Phonophoresis. Phonophoresis, also known as sonophoresis, is the method of using ultrasound waves to increase skin permeability in order to improve the effectiveness of transdermal drug delivery. This method intersects drug delivery and ultrasound therapy. By assisting transdermal drug delivery, phonophoresis can be a painless treatment and an ...
Acoustic streaming is a steady flow in a fluid driven by the absorption of high amplitude acoustic oscillations. This phenomenon can be observed near sound emitters, or in the standing waves within a Kundt's tube. Acoustic streaming was explained first by Lord Rayleigh in 1884. [1] It is the less-known opposite of sound generation by a flow.
Supercavitating torpedo. A supercavitating torpedo is a torpedo using the effect of supercavitation to create a bubble around the torpedo to move at high velocity under water. The following is a list of supercavitating torpedoes which have been developed or are in development. DARPA also considered building supercavitating minisubs dubbed ...
Mechanical index ( MI) is a unitless ultrasound metric. It is defined as [1] where. P r is the peak rarefaction pressure of the ultrasound wave ( MPa ), derated by an attenuation factor to account for in-tissue acoustic attenuation. fc is the center frequency of the ultrasound pulse ( MHz ). MI is measured with a calibrated hydrophone in a tank ...
Fat removal procedures are used mostly in cosmetic surgery with the intention of removing unwanted adipose tissue. The procedure may be invasive, as with liposuction, [1] or noninvasive using laser therapy, radiofrequency, ultrasound or cold ( cryoablation or cryolipolysis) to reduce fat, sometimes in combination with injections. [2] [3] Fat is ...
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