The fraction of time that pulsed ultrasound is on is called ________.
A) pulse repetition period
B) duty factor (DF)
C) period
D) spatial pulse length
Correct Answer:
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Q4: Propagation speed is higher in _ than
Q5: Frequency _ wavelength.
A) is directly proportional to
B)
Q6: Pulsed ultrasound consists of _ separated by
Q7: Propagation speed is primarily determined by the
Q8: Stiffer media have _ sound speeds.
A) lower
B)
Q10: _ are the even and odd multiples
Q11: All of the following are acoustic variables
Q12: Pulse repetition frequency (PRF) refers to the
Q13: Wavelength is the _ over which one
Q14: Regions of lower pressure and density are
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