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What is spectral and color flow Doppler?

The Doppler technique uses reflections from moving red blood cells to characterize blood flow (Beers and Berkow, 1999; Gottdiener et al, 2004). Spectral Doppler echocardiography uses ultrasound to record the velocity, direction, and type of blood flow in the cardiovascular system.

What is spectral Doppler ultrasound?

Spectral Doppler permits graphic display of velocities over time. Velocity curves provide information about absolute velocities and the direction of blood flow as well as how velocity changes in a certain region (pulsed-wave Doppler) or along a certain Doppler line (continuous-wave Doppler).

What is spectral Doppler waveform?

Structure and Components of Doppler Spectra The Doppler spectrum is a time-velocity waveform that represents variation in intravascular blood flow velocities during the cardiac cycle (,2). Time is represented along the horizontal axis, and frequency shift (velocity) is depicted along the vertical axis (,Fig 1).

What is the difference between color Doppler and spectral Doppler?

Color Doppler / Duplex provides flow information within a region of interest (ROI), while spectral Doppler provides information within a \u201csample volume\u201d. Doppler is primarily used in longitudinal views but can also useful in a transverse view.

Is spectral Doppler the same as pulse wave?

Pulsed Wave Doppler (PW) PW Doppler is a type of spectral Doppler that gives us, the user, an option to measure blood flow velocities at a very specific location, or in a given sample. The specific area in which the velocity of the blood flow is measured is called the \u201csample volume\u201d or \u201crange gate\u201d.

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