Term
| The difference between the transmit frequency and the received frequency is called the: |
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Definition
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|
Term
| What angle provides the maximum Doppler shift: |
|
Definition
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Term
| Continuous wave Doppler utilizes _____ elements. |
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Definition
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Term
| Flow towards the transducer is displayed ______ the 0 baseline |
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Definition
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Term
| The range of Doppler shift frequencies are: |
|
Definition
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Term
| The Nyqusit limit is equal to ______ of PRF. |
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Definition
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Term
| Mirror image artifacts occur because of: |
|
Definition
Too much Doppler gain
&
Poor Doppler angle |
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Term
| Which statement about Pulsed Doppler PRF is most correct: |
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Definition
| PRF is limited by depth of flow |
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|
Term
Aliasing is a diagnostic paremeter for severe disease.
TRUE or FALSE |
|
Definition
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|
Term
| Window filling of the spectral tracing is caused by all of the following: |
|
Definition
Turbulent flow
Smple volume placed too close to vessel wall
Doppler gain too high
Somewhat inherent in electronic linear array probes |
|
|
Term
| The maximum amount of turbuence is usually detected: |
|
Definition
| Distal to the site of stenosis |
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|
Term
| The type of flow pattern seen in medium and large size vessels is reffered to as: |
|
Definition
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|
Term
| Color flow Doppler provides_____ velocity information. |
|
Definition
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|
Term
| The color assigned to flow towards the transducer is: |
|
Definition
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|
Term
| The type of processing utilized with most color flow systems is: |
|
Definition
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|
Term
| The minimum # of pulses per line required to assign a color is: |
|
Definition
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|
Term
| No flow within a vessel would be indicated by a _____ color. |
|
Definition
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|
Term
| Color frame rate is affected by : |
|
Definition
Sector size
Color box size
PRF |
|
|
Term
| The purpose of the wall filter is to: |
|
Definition
| Eleminate high amplitude noise artifacts |
|
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Term
| On color flow imaging, the best way to overcome aliasing is: |
|
Definition
|
|
Term
| The color priority on color flow instruments is used to: |
|
Definition
| Decide the relative contribution of color/echoes on the image |
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|
Term
| The color map represents the: |
|
Definition
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|
Term
| The angle corrector is used to: |
|
Definition
| Align the ultrasound beam with vessel lumen |
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|
Term
| Aliasing is found in the following: |
|
Definition
Color Doppler
&
Spectral Pulsed Doppler |
|
|
Term
| Color sensitivity is affected by the following factors: |
|
Definition
Doppler angle to flow
Incident frequency
Reflector speed
PRF |
|
|
Term
| PWD instruments are characterized because of their ability to do: |
|
Definition
Real-time duplex imaging & Doppler
Range resolution
Detect/demonstrate turbulent flow |
|
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Term
| The method used by CW Doppler to discriminate valuable signals is the: |
|
Definition
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|
Term
| In laminar flow, blood is seen to move: |
|
Definition
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|
Term
| In Doppler systems, changing the PRF is equal to changing the: |
|
Definition
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