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Medical Sonography is a diagnostic technique, the ultrasound device. Ultrasonography is used to adjust the size, structure, and pathological changes of internal organs. The following is a brief overview of the history and modern applications of medical and diagnostic ultrasound.

Ultrasonography was in 1953 at Lund University by cardiologist Inge Edler and Carl Hellmuth Hertz, a student studying nuclear physics. Edler had Hertz, if possible, radar, to the body. Hertz said it was impossible, but it could be a possibility of using ultrasound. Hertz was reflectoscopes by ultrasound for nondestructive materials testing, which jointly developed the idea, with this method in medicine and sonography was introduced to the world.

With a device borrowed from a ship's company in Malmö, Sweden, the first successful measurement of heart activity was on 29 October 1953. On 16 December this year, was the method used to echo-encephalogram, an ultrasonic probe of the brain. Edler and Hertz published their findings in 1954.

Meanwhile, Professor Ian Donald and colleagues at the Glasgow Royal Maternity Hospital in Scotland, the first diagnostic procedures using ultrasound. Donald was an obstetrician, an industrial ultrasonic devices used to make experiments on morbid anatomical specimens to assess ultrasound properties. Together with physicist Tom Brown and Dr. John MacVicar, Donald refined the equipment to the differentiation of pathology in living patients. These results were published 7th June 1958 as "Investigation of Abdominal Masses by Pulsed Ultrasound", one of the most important publications ever in the field of diagnostic medical imaging.

Professor Donald and Dr James Willocks then these techniques to obstetrics to assess the size and growth of the fetus. As the technical quality of scans has been further developed, it became possible, the pregnancy from start to finish and diagnose complications such as multiple pregnancy and fetal abnormalities. Diagnostic ultrasound has been in many other areas of medicine.

Today, medical sonography is in:

• Cardiology
• Endocrinology
• Gastroenterology
• Gynecology
• Obstetrics
• Ophthalmology
• Urology
• Anesthesia

Modern diagnostic ultrasound with a probe with one or more acoustic transducers to stimulate the economy in a material. Whenever a sound wave on a material with different acoustic impedance, the probe detects an echo. The time it takes for the echo to travel back to the probe are measured and used to calculate the depth of the tissue.

The sound frequencies for medical sonography are usually in the range 1-10 MHz. Higher frequencies have a shorter wavelength, producing images with higher resolution. However, the damping of the sound wave is at higher frequencies, so that in order to better deeper tissues, a lower frequency (3-5MHz) is used.

The value of ultrasonography in healthcare facilities weighs heavily on its multi-functionality. It produces images of muscle and soft tissue, useful for delineating boundaries between fixed and fluid-filled spaces. It offers live images so that the operator to identify the main areas for the diagnosis and documentation of changes for a quick diagnosis. It shows the structure and function of internal organs. It is a useful tool to the musculoskeletal system, to problems with muscles, ligaments, tendons and joints. It also helps in identifying blockages, stenosis and other vascular anomalies. With such far-reaching benefits that modern medical facility is located in a severe loss, without the most modern equipment.