ULTRASOUND Meaning and
Definition
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Ultrasound is a medical imaging technique that uses high-frequency sound waves to produce detailed images of internal body structures. It is a non-invasive diagnostic tool that enables healthcare professionals to examine organs, tissues, and blood vessels, as well as monitor the development of a fetus during pregnancy.
The process of ultrasound involves the use of a transducer, a handheld device that emits sound waves and detects their echoes when they bounce off internal structures. The transducer is placed on the skin, and a gel is often applied to ensure proper contact and improve the sound wave transmission. These echoes are then analyzed by a computer, which generates real-time images displayed on a screen for interpretation by medical professionals.
Ultrasound has diverse applications across various medical fields. It is commonly used to examine and evaluate the heart, liver, kidneys, bladder, and other organs. Additionally, it aids in the identification and characterization of tumors, cysts, and other abnormalities. In obstetrics, ultrasound plays a fundamental role in monitoring the development and well-being of a fetus, including assessing growth, detecting congenital anomalies, and determining the position of the placenta.
One of the major advantages of ultrasound is its safety and non-invasiveness, as it does not involve ionizing radiation like X-rays or computed tomography (CT) scans. It is also relatively quick, painless, and portable, making it widely accessible in clinical settings. However, it does have limitations, as it may be less effective in examining structures hidden by bone or could be affected by gas or air within the body.
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Etymology of ULTRASOUND
The word "ultrasound" combines the prefix "ultra-" which means "beyond" or "extreme" in Latin, and the word "sound", which refers to vibrations that travel through the air or another medium to the ear. In medicine, "ultrasound" specifically refers to high-frequency sound waves above the range of human hearing, used for diagnostic or therapeutic purposes. The term was coined in the mid-20th century, based on the technology's ability to provide imaging beyond the limitations of audible sound.
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