Flow, flow, flow your boat
Study of how blood flows through the body
Hemodynamics
Change in frequency of a wave moving relative to the source
Doppler Shift
Reduces the ringing, which improves resolution and shortens the spatial pulse length.
Damping material
Abnormal narrowing of a passageway or structure in the body, such as a blood vessel
Stenosis
flexible cells of artery walls are replaced with cells that are more fibrous
Fibromuscular dysplasia
The change in pressure over a given distance
Pressure gradient
Technique that uses short pulses to measure the characteristics of sound
Pulsed Doppler
Materials with the ability to generate energy when squeezed or pressed.
Piezoelectric
The blockage or closing of an opening, blood vessel, or hollow organ.
Occlusion
The buildup of fats, cholesterol and other substances in and on the artery walls
Atherosclerosis
Quantity of fluid passing through at a specific period of time
Flow rate
Ultrasound waves are continuously emitted from the transducer non stop
Continuous Doppler
Helps transfer ultrasound energy from the transducer's elements to the medium
Matching layer
A bulging, weakened area in the wall of a blood vessel
Aneurysm
The stiffening of a tissue or anatomical feature
Sclerosis
Parallel movement of fluids, such as liquids or gases, in layers
Laminar Flow
More sensitive to flow than conventional color Doppler
Energy Doppler
Device that generates or senses ultrasound energy.
Transducer
Occurs when the inner wall of an artery tears, allowing blood to separate the layers of the artery wall
Dissection
Occurs when blood flow through one or more arteries is reduced
Insufficiency
When the particles in a fluid start to move perpendicular to the mean flow direction
Turbulent flow
Graphical representation of flow velocity over time
Spectral waveform
Artifact that can occur when the structure being examined exceeds the Nyquist limit
Aliasing
an abnormal connection between two body parts, such as a blood vessel and another structure.
A/V Fistula
Condition where a loss of blood supply causes body tissue to die.
Gangrene