DAVIES SPI ACTUAL EXAM TEST PAPER FULL QUESTIONS CORRECT RESPONSES.pdf

DAVIES SPI ACTUAL EXAM TEST PAPER FULL QUESTIONS CORRECT RESPONSES




Question:
Which transducers do NOT use backing material?

Answer:
Continuous Wave Doppler do NOT use backing material



Question:
What is the greatest advantage of PULSED wave doppler?

Answer:
Range specificity; being able to select the exact location where velocities are measured



Question:
What is the primary DISADVANTAGE of pulsed wave doppler?

Answer:
Inaccurate measurement of high velocities; ALIASING



Question:
Low quality factor, lower sensitivity, and wide bandwidth describe what type of transducer:

Answer:
Imaging and doppler transducers



Question:
What is the most common error associated with Doppler ultrasound?

,Answer:
Aliasing



Question:
The very top of the display in doppler is called:

Answer:
The Nyquist limit



Question:
The part of the spectrum appearing at the bottom of the display in a doppler image is called:

Answer:
Aliasing



Question:
What is the limit at which aliasing occurs?

Answer:
Exceeding the Nyquist limit



Question:
What is the Nyquist limit formula?

Answer:
PRF (Hz) /2



Question:
What are the 3 acoustic variables that identify sound waves?

Answer:

, Pressure, density, distance



Question:
What are the 7 parameters that describe sound waves?

Answer:
Period, frequency, amplitude, power, intensity, wavelength, speed



Question:
"The tie required to complete a single cycle" describes:

Answer:
Period



Question:
"Number of cycles of an acoustic variable that occur in one second" describes:

Answer:
Frequency



Question:
Audible sound range:

Answer:
20-20,000 Hz



Question:
Ultraound range:

Answer:
Greater than 20,000 Hz