ultrasound scanning

ultrasound scanning

A method of body imaging based on the reflectivity of sound. By using very high frequency (ultrasonic) sound the wavelengths are brought down to the necessary small dimensions. Piezo-electric transducers are used both to generate the waves and to pick up the reflected sound. Ultrasound scanning is believed to be completely safe and is widely used in obstetrics as well as in other disciplines. It can show the position of the placenta, reveal twins at an early stage, show the size and sex of the fetus and detect major fetal abnormalities such as ANENCEPHALY and SPINA BIFIDA. It can measure rates of blood flow in the fetus and can detect certain forms of congenital heart disease. Ultrasound is also widely used to scan fluid-filled organs, especially the heart. Echocardiography can reveal the heart's action in detail. Doppler ultrasound provides essential information on blood flow. Intravenously-injected microbubble agents increase the reflectivity of blood many times and greatly widen the scope of ultrasound scanning.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
References in periodicals archive ?
Intelligent Ultrasound recently entered into a collaboration with the National Imaging Academy Wales (NIAW) to develop artificial intelligence (AI) tools to aid ultrasound scanning and to enhance ultrasound education.
ScanNav uses machine-learning based algorithms to identify and grade ultrasound images to provide scan assessment and audit of protocol-based ultrasound scanning.
Because of the high frequency of rotator cuff tear after shoulder dislocation in patients aged over 40, they should have either urgent ultrasound scanning or MRI.
Caption: Figure 1: A) Diagrammatic representation of cannulae, ultrasound scanning plane and radial artery cross section as seen in the accompanying sonogram.
Ultrasound scanning alone is used more often for women under 35, to avoid the slight risk associated with X-rays.
The purpose of this study ("Evaluation of the repeatability of ultrasound scanning for detection of feline polycystic kidney disease" in the Journal of Feline Medicine and Surgery, 2009) was to demonstrate the repeatability of ultrasound scanning in the detection of PKD and to assess the progression of the disease over time.
A spokeswoman said: "Liverpool Women's have recently undertaken a tender process to appoint a company to support the Trust in its provision of ultrasound scanning.
In 10 egg-producing birds, transcutaneous ultrasound scanning was performed at 3-hour intervals and blood sampling at hourly intervals during a period of at least 48 hours (one egg laying cycle).
We found a dramatic overuse of ultrasound scanning; the 400 women surveyed had had ah average of 6.6 scans and 8.3 antenatal visits during pregnancy, while one-fifth had had ten scans or more.
Cranial ultrasound scanning significantly predicted developmental outcomes in symptomatic newborns with cytomegalovirus, based on a study of 57 infants reported in the February issue of the Journal of Pediatrics.

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