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ultrasonography |
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ultrasoundor ultrasonographyUse of ultrasonic waves to produce images of body structures. The waves travel through tissues and are reflected back where density differs (e.g., the border between a hollow organ's wall and its inside). The reflected echoes are received by an electronic apparatus that measures their intensity level and the position of the tissue reflecting them. The results can be displayed as still images or as a moving picture of the inside of the body. Unlike X-rays or other ionizing radiation, ultrasound carries minimal, if any, risk. Most often used during pregnancy to examine the fetus, ultrasound imaging is also used on internal organs and on the eye, breast, and major blood vessels. It can often show whether a growth is benign or malignant. See also diagnostic imaging. ultrasonography (acoustics) How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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A PICC-associated DVT was defined as a symptomatic event prompting a duplex ultrasonography study which confirmed venous thrombosis. Carotid duplex ultrasonography at that time revealed a 70 to 80% stenosis of the right internal carotid artery (figure). The study, "Screening for Carotid Artery Stenosis with Power Doppler Imaging Using a Portable Duplex Ultrasonography Device," was conducted at Wake Forest University in Winston-Salem, North Carolina. |
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