Which is NOT a type of Doppler?
Gray Scale
Pulsed Wave
Color Doppler
Continuous Wave
The change in frequency of a sound, light or radio wave caused by the motion of the source or the observer.
Doppler Shift
Amplitude
Doppler Effect
Velocity
The difference between the emitted frequency and the received frequency.
Doppler Equation
Angle
If the returning frequency is lower than the emitted frequency, the Doppler shift is...
Positive
Negative
There is no shift
Doppler should always be measured __________________ to flow?
Parallel
Perpendicular
Which component is NOT part of Doppler display?
Time
Range Resolution
The small "double lined" area on the cursor used to sample blood flow for velocity at a specific location.
Gate
Sample volume
Depth
Dynamic Range
Pulsed Wave Doppler uses a minimum of 2 crystals.
A major limitation of PW Doppler is the inability to measure fast blood flow.
Aliasing is dependent on this.
Transducer
PRF
The main advantage of Continuous Wave Doppler is the ability to measure very slow blood flows.
The main disadvantage of CW Doppler is.
Inaccurate flow measurements
Range ambiguity
Aliasing
No image
Also known as a pencil probe.
Piedoff Probe
M-Mode
Cursor
Sample Volume
Normal A-V valve shape have an "M" shape during diastole seen above the baseline.
Semilunar valves have a "U" shape during systole below the baseline.
Pulsed Doppler showing flow with a dark center reflects what kind of flow?
Turbulent
Laminar
High velocity
Low velocity
Normal Tricuspid valve velocity.
0.5 - 1.1 m/sec
0.5 - 0.7 m/sec
0.3 - 1.1 m/sec
0.3 - 0.7 m/sec
Normal Pulmonic Valve velocity.
0.6 - 0.9 m/sec
0.6 - 1.1 m/sec
0.5 - 0.9 m/sec
Anything above normal velocity measurements means _______________?
Regurgitation
Stenosis
Mitral & Tricuspid regurgitation is _______ shaped when chronic.
M
V
U
Trapezoid
Aortic & Pulmonic Stenosis will have a ________ shape.
Which types of Doppler must you use with ALL valves?
PW & CW
PW & Color
CW & Color
PW
This is an example of ___________________ flow?
Aortic
Hepatic Vein
Pulmonary
A-V valve regurgitation
This represents what type of flow pattern?
Semilunar valve Stenosis
Normal Semilunar valve flow
A-V Valve Stenosis
Normal A-V Valve flow
Aliasing frequently occurs with which type of Doppler?
Color
CW
Please wait - loading…