= sonography; n.
the use of ultrasound to produce images of structures in the human body. The ultrasound probe sends out a short pulse of high-frequency sound and detects the reflected waves (echoes) occurring at interfaces within the organs. The direction of the pulse can then be moved across the area of interest with each pulse to build up a complete image. Scans may produce a single stationary image similar to a photograph (static) or multiple sequential images similar to a video (real-time imaging). The ultrasound waves are transmitted from – and echoes detected by – piezoelectric crystals contained within the scanning probe (see transducer). As far as is known, there are no adverse effects from the use of ultrasound at diagnostic energies. Ultrasound waves are blocked by gas, as in the lungs and bowel, which can obscure underlying structures. The detail seen increases with the frequency of the ultrasound but the depth of penetration decreases. Ultrasonography is extensively used in obstetrics, including the diagnosis of pregnancy, assessment of gestational age, diagnosis of malpresentations, ectopic pregnancies, and hydatidiform moles, and detection of structural fetal abnormalities (see also transvaginal ultrasonography). It is also used to examine the abdominal organs, urinary tract, blood vessels, muscles, and tendons. More specialized techniques include echocardiography, transrectal ultrasonography (TRUS), intraoperative ultrasound (IOUS), and endoscopic ultrasound examinations.

The new mediacal dictionary. 2014.

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  • ultrasonography — (n.) 1960, from ULTRA (Cf. ultra ) + sonography (see SONOGRAM (Cf. sonogram)) …   Etymology dictionary

  • ultrasonography — [ul΄trəsə näg′rə fē] n. the technique of using ultrasound to form an image or picture ultrasonographic [ul΄trəsän΄ə graf′ik] adj …   English World dictionary

  • ultrasonography — The location, measurement, or delineation of deep structures by measuring the reflection or transmission of high frequency or ultrasonic waves. Computer calculation of the distance to the sound reflecting or absorbing surface plus the known… …   Medical dictionary

  • ultrasonography — noun using the reflections of high frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs • Syn: ↑sonography, ↑echography, ↑ultrasound • Hypernyms: ↑imaging,… …   Useful english dictionary

  • ultrasonography — noun Etymology: ultrasonic + o + graphy Date: 1951 ultrasound 2 • ultrasonographer noun • ultrasonographic adjective …   New Collegiate Dictionary

  • ultrasonography — /ul treuh seuh nog reuh fee, soh /, n. a diagnostic imaging technique utilizing reflected high frequency sound waves to delineate, measure, or examine internal body structures or organs. [1950 55; ULTRA + SONO + GRAPHY] * * * …   Universalium

  • ultrasonography — noun a) The use of ultrasound to produce diagnostic images of the internal organs of the body, or of a foetus. b) The use of ultrasound to form images of underwater structures. Syn: sonography See Also …   Wiktionary

  • ultrasonography — [ˌʌltrəsə nɒgrəfi] noun Medicine a technique using echoes of ultrasound pulses to delineate objects or areas of different density in the body. Derivatives ultrasonographic adjective …   English new terms dictionary

  • ultrasonography — ul·tra·so·nog·ra·phy …   English syllables

  • ultrasonography — ul•tra•so•nog•ra•phy [[t]ˌʌl trə səˈnɒg rə fi, soʊ [/t]] n. med a diagnostic imaging technique utilizing reflected ultrasonic waves to delineate, measure, or examine internal body structures or organs • Etymology: 1950–55 …   From formal English to slang

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