QUESTIONS AND CORRECT ANSWERS
Which instrument controls affects the amplitude (db) of the outgoing
signal?
A. Gain
B. Reciever gain
C. Transmit gain
D. Overall gain - ANSWER-c. Transmit gain
Which of the following is used to convert doppler shift information into
color?
A. High PRF
B. Fast Fourier transform
C. Autocorrelation
D. Time interval histogram - ANSWER-c. Autocorrelation
The best way to increase the near field length of an ultrasound beam is to
- ANSWER-increase transducer diameter
If the depth is increases, what change will occur to the PRP?
A. Decrease
B. No change
C. Increase
D. Halved - ANSWER-c. Increase
, Frequency is reduced from 8mhz to 4 mhz, what will be the result to the
acoustic frequency?
A. Increase
B. No change
C. Decrease - ANSWER-b. No change
Multiple echoes. Equally spaced originating from a gas bubble is called
A. Comet tail
B. Ring down
C. Slice thickness artifact
D. Mulipath - ANSWER-b. Ring down
An increase in red blood cell velocity will blank the doppler shift
A. Increase
B. Decrease
C. Not change
D. Cannot be predicted - ANSWER-a. Increase
The primary advantage of CW Doppler is
A. Range resolution
B. Range discrimination
C. Range ambiguity
D. Range gating
E. Absence of sampling rate - ANSWER-e. Absence if sampling rate