Ultrasonography
| Definition: |
The visualization of deep structures of the body by recording the reflections of echoes of pulses of ultrasonic waves directed into the tissues. Use of ultrasound for imaging or diagnostic purposes employs frequencies ranging from 1.6 to 10 megahertz. |
| Notes: |
GEN only; prefer /ultrasonogr with organs & diseases: Manual 19.7+, 19.8.77; ultrasonic or sonographic imaging of organs is organ /ultrasonogr; X ref ECHOTOMOGRAPHY is seen in foreign lit: if so, use "ultrasonography" or "ultrasonic diagnosis" or "ultraso |
| Also Called: |
Echotomography, Computer,Tomography, Ultrasonic,Diagnosis, Ultrasonic |
Ultrasonography Categories.
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Echocardiography - Ultrasonic recording of the size, motion, and composition of the heart and surrounding tissues. The standard approach is transthoracic. |
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Endosonography - Ultrasonography of internal organs using an ultrasound transducer sometimes mounted on a fiberoptic endoscope. In endosonography the transducer converts electronic signals into acoustic pulses or continuous waves and acts also as a receiver to detect reflected pulses from within the organ. An audiovisual-electronic interface converts the detected or processed echo signals, which pass through the electronics of the instrument, into a form that the technologist can evaluate. The procedure should not be confused with ENDOSCOPY which employs a special instrument called an endoscope. The "endo-" of endosonography refers to the examination of tissue within hollow organs, with reference to the usual ultrasonography procedure which is performed externally or transcutaneously. |
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Microscopy, Acoustic - A scientific tool based on ULTRASONOGRAPHY and used not only for the observation of microstructure in metalwork but also in living tissue. In biomedical application, the acoustic propagation speed in normal and abnormal tissues can be quantified to distinguish their tissue elasticity and other properties. |
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Ultrasonography, Doppler - Ultrasonography applying the Doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually red blood cells) in the bloodstream along the ultrasound axis in direct proportion to the velocity of movement of the targets, to determine both direction and velocity of blood flow. (Stedman, 25th ed) |
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Ultrasonography, Interventional - Ultrasonography using invasive or surgical procedures. Its widest application is intravascular ultrasound imaging but it is useful also in urology and intra-abdominal conditions. |
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Ultrasonography, Mammary - Use of ultrasound for imaging the breast. The most frequent application is the diagnosis of neoplasms of the female breast. |
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Ultrasonography, Prenatal - The visualization of tissues during pregnancy through recording of the echoes of ultrasonic waves directed into the body. The procedure may be applied with reference to the mother or the fetus and with reference to organs or the detection of maternal or fetal disease. |
Ultrasonography Definitions and Terms
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