Ultrasonography, Doppler
| Definition: |
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) |
| Notes: |
GEN or unspecified; prefer specifics; /drug eff /rad eff permitted; do not use /util except by MeSH definition; DF: ULTRASONOGR DOPPLER |
| Previously Indexed: |
Blood Flow Velocity (1974-1994),Ultrasonics/diagnostic use (1974-1984),Ultrasonography (1985-1994) |
Ultrasonography, Doppler Categories.
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Ultrasonography, Doppler, Duplex - Ultrasonography applying the Doppler effect combined with real-time imaging. The real-time image is created by rapid movement of the ultrasound beam. A powerful advantage of this technique is the ability to estimate the velocity of flow from the Doppler shift frequency. |
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Ultrasonography, Doppler, Pulsed - Ultrasonography applying the Doppler effect, with velocity detection combined with range discrimination. Short bursts of ultrasound are transmitted at regular intervals and the echoes are demodulated as they return. |
Ultrasonography, Doppler Definitions and Terms
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