![]() ![]() ![]() From the clinical aspect the ultrasound possesses the priceless significance because of its noninvasive, good visualization characteristics and relatively easy management ( 4, 5). First was introduced in the obstetrics, and after that in all the fields of the medicine (the general abdominal diagnostics, the diagnostics in the field of the pelvis, cardiology, ophthalmology and orthopedics and so on) ( 3). The application of ultrasound in medicine began in fifties of last century. The first practical application of ultrasound is recorded during the World War I in detecting of submarines. A water-based gel is used to couple the ultrasound between the transducer and patient ( 1, 2).Īlthough discovered 12 years before the X-ray ray (1883.), the ultrasound is a much later found application in medicine. Sonographers typically use a hand-held probe (called a transducer) that is placed directly on and moved over the patient. Sonography is effective for imaging soft tissues of the body. Diagnostic sonography (ultrasonography) is an ultrasound-based diagnostic imaging technique used to visualize subcutaneous body structures including tendons, muscles, joints, vessels and internal organs for possible pathology or lesions. Higher frequencies have a correspondingly smaller wavelength, and can be used to make sonograms with smaller details. Typical diagnostic sonographic scanners operate in the frequency range of 2 to 18 megahertz, hundreds of times greater than the limit of human hearing. In physics the term “ultrasound” applies to all acoustic energy with a frequency above human hearing (20,000 hertz or 20 kilohertz). ![]()
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